Legal Definitions and Terms - "O" List
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Below is our growing list of legal definitions beginning with the letter "O". If there is a term you are looking for please use our search form below and enter the legal term. US Legal, Inc. updates the database of terms weekly and boasts the most up-to-date legal term dictionary on the Internet.
List of legal terms beginning with the Letter "O"
- O Visa
- O-1 Visa
- O-1A
- O-1B
- O-2
- O-3
- O.R.
- O.S.C
- Oath [Patent]
- Oath Against an Oath
- Oath in Litem
- Oath of Abjuration
- Oath of Allegiance
- Oath of Calumny
- Oath of Office
- Oath of Surety
- Oath or Affirmation Clause
- Oaths
- Obesity
- Obfuscate
- Obit Agreement
- Obiter Dictum
- Object of the Attack
- Object Offense
- Objection
- Objection in Point of Law
- Objection to Consideration of a Question
- Objection to Dischargeability ( Bankruptcy)
- Objection to Exemptions (Bankruptcy)
- Objection to the Notice of Intent to Proffer
- Objective Ethics
- Objective Evidence
- Objective Medical Documentation
- Objective Medical Evidence
- Objective Novation
- Objective Responsibility
- Objective Theory of Contract
- Obligatio Ex Delicto
- Obligation [Oil and Gas]
- Obligation of Contracts
- Obligations
- Obligee
- Obligor
- Obreption
- Obscene
- Obscenity
- Observable
- Observer Mission
- Obsessive-Compulsive Disorder
- Obsolescence
- Obsolete Ship
- Obsolete Vessel
- Obstructing Justice
- Obstruction of Governmental Operation
- Obstruction of Justice
- Obstruction of Public Administration of Government
- Obtaining a Controlled Substance by Fraud
- Obtrusive Space Advertising
- Obviousness
- Occupancy
- Occupancy Fraud
- Occupancy Rate
- Occupancy Standard
- Occupare
- Occupation Tax
- Occupational Base
- Occupational Cluster [Administrative Personnel]
- Occupational Crime
- Occupational Disease
- Occupational Experience
- Occupational Hazard
- Occupational Hearing Loss
- Occupational Illness
- Occupational Injury
- Occupational Radiation Dose
- Occupational Rent
- Occupational Safety and Health Act
- Occupational Safety and Health Administration
- Occupational Safety and Health Administration Specialists
- Occupational Safety and Health Standard
- Occupational Therapy
- Occupational Tuberculosis
- Occupier's Liability
- Occupy The Field
- Occupying Agency
- Occurence Policy
- Occurrence
- Occurrence [Energy]
- Occurrence Rule
- Ocean
- Ocean Acidification
- Ocean Bill of Lading
- Ocean Common Carrier
- Ocean Dumping
- Ocean Dumping Act
- Ocean Dumping Ban Act of 1988
- Ocean Freight Forwarder
- Ocean Marine Insurance
- Ocean Thermal Energy Conversion Facility or Plantship
- Ocean Thermal Energy Conversion Plantship
- Ocean Transportation Brokerage
- Ocean Transportation Intermediary
- Ocean Transportation-Related Services
- Ocean Waters
- Ocean Waybill
- Ocean, Coastal, and Great Lakes Resources
- Oceangoing Ship
- Oceanographic Research Vessel
- Octane Rating
- Octo Tales
- Odd Lot
- Odd-Lot Doctrine
- Oddball Trusts
- Odometer
- Odometer Statements
- Odorized Propane
- OEM
- Of Archaeological Interest
- Of Counsel
- Off Calendar
- Off the Books Income
- Off the Record
- Off-Hire Clause
- Off-Lease Property
- Off-Line Bank
- Off-Road Vehicle
- Off-Site Property [Education]
- Off-The-Record Communication
- Off-Track Betting Office
- Off-Track Betting System
- Off-Track Pari-Mutuel System
- Off-Track State
- Offence Principle
- Offender
- Offense
- Offense of Escape
- Offense of Obstructing Navigation
- Offense of Restricting and Obstructing a Police Officer
- Offensive Collateral Estoppel
- Offer
- Offer in Compromise Program [OIC Program]
- Offer of Compromise
- Offer of Employment
- Offer of Judgment
- Offer to All the World
- Offer to Guarantee
- Offered Evidence
- Offering
- Offering [Patents]
- Offering Memorandum
- Office Account
- Office Action
- Office and Clerical
- Office Automation
- Office for Victims of Crime [OVC]
- Office of a Contracting Party
- Office of Administrative Law Judges [Federal Communications Commission]
- Office of Adult Probation
- Office of Allowances [Department of State]
- Office of Analysis, Research and Technology
- Office of Assistant Secretary for Administration and Management [Department of Labor]
- Office of Attorney Recruitment and Management [Department of Justice]
- Office of Bilateral Trade Affairs [BTA] [Department of State]
- Office of Buildings and Acquisitions [L/BA] [Department of State]
- Office of Chemical and Biological Weapons [CBW]
- Office of Citizenship [Immigration]
- Office of Civil Rights [Department of State]
- Office of Commercial and Business Affairs [EEB/CBA] [Department of State]
- Office of Communications Business Opportunities [Federal Communications Commission]
- Office of Community Oriented Policing Services
- Office of Community Planning and Development [HUD]
- Office of Community Services [OCS]
- Office of Congressional and Intergovernmental Affairs [Department of Labor]
- Office of Congressional and Intergovernmental Relations [HUD]
- Office of Consumer Litigation
- Office of Coroner
- Office of Departmental Equal Employment [HUD]
- Office of Diplomatic Law and Litigation [L/DL] [Department of State]
- Office of Disability Employment Policy-ODEP [Department of Labor]
- Office of Dispute Resolution [Department of Justice]
- Office of Dispute Resolution for Acquisition
- Office of Diversion Control
- Office of Drug and Alcohol Policy and Compliance
- Office of Economic Policy Analysis and Public Diplomacy [EEB/EPPD] [Department of State]
- Office of Electronic Government
- Office of Elementary and Secondary Education [OESE]
- Office of Engineering and Technology [FCC]
- Office of Engineering and Technology [Federal Communications Commission]
- Office of English Language Acquisition
- Office of Environmental Quality
- Office of Environmental Quality Management Fund
- Office of Fair Housing and Equal Opportunity [HUD]
- Office of Federal Contract Compliance Programs
- Office of Federal Housing Enterprise Oversight
- Office of Federal Lands Highway
- Office of Field Policy and Management [HUD]
- Office of Foreign Labor Certification
- Office of Foreign Litigation [OFL]
- Office of General Counsel [FCC]
- Office of General Counsel [Federal Communications Commission]
- Office of Government Ethics [OGE]
- Office of Government Policy [OGP]
- Office of Grading
- Office of Healthy Homes and Lead Hazard Control [HUD]
- Office of Hearings and Appeals [HUD]
- Office of Homeland Security [OHS]
- Office of Housing [HUD]
- Office of Information and Regulatory Affairs [OIRA]
- Office of Information Policy [Department of Justice]
- Office of Initial Patent Examination
- Office of Inspector General [FCC]
- Office of Inspector General [Federal Communications Commission]
- Office of Inspector General [HUD]
- Office of Inspector General [Labor]
- Office of Insular Affairs [OIA]
- Office of Intelligence and Analysis [Department of Treasury]
- Office of Intergovernmental Affairs [FCC]
- Office of Intergovernmental Affairs [Federal Communications Commission]
- Office of Intergovernmental and Public Liaison [Department of Justice]
- Office of Justice Programs
- Office of Juvenile Justice and Delinquency Prevention [OJJDP]
- Office of Labor Management Standards [OLMS]
- Office of Labor Relations [HUD]
- Office of Legal Counsel [Department of Justice]
- Office of Legal Policy [Department of Justice]
- Office of Legislative Affairs [Department of Justice]
- Office of Legislative Affairs [Federal Communications Commission]
- Office of Legislative Affairs [Immigration]
- Office of Management and Budget [OMB]
- Office of Management Policy [Department of State]
- Office of Media Relations [FCC]
- Office of Media Relations [Federal Communications Commission]
- Office of Multilateral Trade Affairs
- Office of National AIDS Policy [ONAP]
- Office of National Drug Control Policy (ONDCP)
- Office of Native Affairs and Policy [Federal Communications Commission]
- Office of Naval Intelligence [ONI]
- Office of Origin
- Office of Personnel Management Personnel Records
- Office of Policy Development
- Office of Privacy and Civil Liberties [Department of Justice]
- Office of Professional Responsibility [Department of Justice]
- Office of Public Affairs [Department of Justice]
- Office of Public Affairs [HUD]
- Office of Public and Indian Housing
- Office of Public Engagement [Immigration]
- Office of Refugee Resettlement [ORR]
- Office of Safe and Drug-Free Schools
- Office of Safety Act Implementation
- Office of Science and Technology
- Office of Self-Governance (OSG)
- Office of Small and Disadvantaged Business Utilization [HUD]
- Office of Small and Disadvantaged Business Utilization [USDOJ]
- Office of Small Business Development Centers
- Office of Small Business Programs [OSBP]
- Office of Solid Waste and Emergency Response
- Office of State Guardian
- Office of Strategic Planning and Policy Analysis [FCC]
- Office of Strategic Planning and Policy Analysis [Federal Communications Commission]
- Office of Surface Mining
- Office of Sustainable Housing and Communities [HUD]
- Office of Technology Assessment
- Office of Terrorism and Financial Intelligence
- Office of the Assistant Secretary for Policy [Department of Labor]
- Office of the Associate Attorney General
- Office of the Chief Financial Officer [Department of Labor]
- Office of the Chief Information Officer [Department of Labor]
- Office of the Consumer Advocate
- Office of the Coordinator for Reconstruction and Stabilization [Department of State]
- Office of the Deputy Attorney General
- Office of the Federal Detention Trustee
- Office of the Federal Register [OFR]
- Office of the Inspector General [Department of Justice]
- Office of the Legal Adviser [Department of State]
- Office of the Managing Director [FCC]
- Office of the Managing Director [Federal Communications Commission]
- Office of the Pardon Attorney [Department of Justice]
- Office of the Science and Technology Adviser [Department of State]
- Office of the Solicitor [Department of Labor]
- Office of the U.S. Global AIDS Coordinator [Department of State]
- Office of the Under Secretary for Global Affairs [Department of State]
- Office Of The United States Trade Representative (USTR)
- Office of Thrift Supervision (OTS)
- Office of Tribal Justice
- Office of War Crimes Issues
- Office of Work Place Diversity [FCC]
- Office of Work Place Diversity [Federal Communications Commission]
- Office of Workers' Compensation Programs (OWCP)
- Office on Violence Against Women
- Office Romance
- Office Security
- Office Supplies
- Office to Monitor and Combat Trafficking in Persons [Department of State]
- Officer De Facto
- Officer De Jure
- Officer in Charge, Marine Inspection
- Officer of the Day
- Officer or Employee of an Agency [Education]
- Officers of a Corporation
- Official Act
- Official Agricultural Product Marketing Device
- Official Certificate for Agricultural Product Certification
- Official Compendium
- Official Detention
- Official Development Assistance [ODA]
- Official Device [Agricultural Marketing Service]
- Official English Movement
- Official Forms
- Official Grader
- Official Identification [Agricultural Marketing Service]
- Official Immunity
- Official Information
- Official Mark (Agricultural Product)
- Official Memorandum( Agriculture)
- Official Notice
- Official Policy
- Official Poverty Line
- Official Proceeding [Criminal Procedure]
- Official Residence [Department of State Standardized Regulations]
- Official Residence Expenses [Department of State Standardized Regulations]
- Official Responsibility
- Official Sample
- Official Seal [Education]
- Official Visa
- Official Youth Case Record
- Officially Drawn Sample [Agricultural Marketing Service]
- Officially Induced Error
- Officials and Managers
- Officious Intermeddler
- Officit Conatus Si Effectus Sequatur
- Offset
- Offset Account
- Offset Clause
- Offset Statement
- Offshore
- Offshore Bank
- Offshore Banking License
- Offshore Corporations
- Offshore Enterprise
- Offshore Facility
- Offshore Financial Centre
- Offshore Oil Rig
- Offshore Platform Radiography
- Offshore Service Vessels
- Offshore Supply Vessel
- Offshore Trusts
- Offshore Vessels
- Offshore Whiting Resource
- Offshoring
- Offsite Disposal [Energy]
- OFIA
- OHA
- OIG [Department of Labor]
- Oil
- Oil and Gas Lease
- Oil and Gas Royalties
- Oil and Gas Royalty Management
- Oil Depletion Allowance
- Oil Gas And Minerals
- Oil Payment
- Oil Pollution Act
- Oil Shale, Tar Sands, and Other Strategic Unconventional Fuels Act
- Oil Spill
- Oil Spill Financial Responsibility
- Oil Spill Removal Organization
- Oil Spill Response Vessel
- Oil Tanker
- Oilseed
- OJP
- Oklahoma City National Memorial Trust
- Old Age Survivor and Disability Insurance
- Old-Age Assistance
- Old-Soldier's Rule
- Older Americans Act
- Older Individual who is Blind [Education]
- Older Workers Benefit Protection Act
- Oligarchy
- Oligopoly
- Oligopsony
- OMB
- Ombudsman
- Ombudsman for the Energy Employees Occupational Illness Compensation Program
- Omissio Eorum Quae Tacite Insunt Nihil Operatur
- Omission
- Omitted Child Statutes
- Omitted Heir
- Omitted Property
- Omne Crimen Ebrietas Et Incendit Et Detegit
- Omne Jus Aut Consensus Fecit, Aut Necessitas Constituit Aut Firmavit Consuetude
- Omnibus Bill
- Omnibus Clause
- Omnibus Crime Control and Safe Streets Act
- Omnibus Hearing
- Omnibus Transportation Employee Testing Act of 1991
- Omnicide
- On All Fours
- On Deck Bill Of Lading
- On or About
- On or Before
- On Point
- On the Job Training
- On the Merits
- On the Pad
- On the Stand
- On VA Rolls [Veterans Affairs]
- On-call Employees
- On-going Subsidy Fee [SISMBD loan]
- On-Going Support Services [Education]
- On-Line Sampling Inspection [Agriculture]
- On-Reservation Status
- On-Sale Bar [Patent]
- On-Site Property [Education]
- On-Site Testing
- On-Time Performance [Aeronautics and Space]
- On-Time Performance Code [Aeronautics and Space]
- On-Track Safety [Transportation]
- On-Track Wager
- Onboarding
- One Action Rule
- One Bite Rule
- One Hundred And Eighty-Three (183) Days' Rule
- One Strike Eviction
- One-Book Rule
- One-Call Notification
- One-Call Notification System [Transportation]
- One-Court-of-Justice Doctrine
- One-Leg Stand Test
- One-Person, One-Vote Rule
- One-Satisfaction Rule
- One-Subject Rule
- One-Third of an Academic Year [Education]
- One-to-One Supervision (Juvenile)
- One-Year Rule[Patent Law]
- Onerari Non
- Onerous Contracts
- Onerous Gift
- Onerous Title
- Onerous Trust
- Ongoing committee
- Ongoing Guarantee Fee [Business Credit and Assistance]
- Online Auctions
- Online Background Check
- Online Contact Information
- Online Copyright Infringement Liability Limitation Act
- Online Pharmacy
- Online Pricing
- Online Representations and Certifications Application
- Onshore Facility
- Onus
- Onus Probandi
- Open Accounts
- Open Adoption
- Open and Notorious Cohabitation
- Open and Obvious doctrine
- Open Bid
- Open Caucus
- Open Check
- Open Commission Meeting
- Open Commodity Contract
- Open Contracts
- Open Court
- Open Diplomacy
- Open Door Policy
- Open Dump
- Open End Credit Plan
- Open Ended Question
- Open Field Doctrine
- Open Justice
- Open Letter of Credit
- Open Lewdness
- Open Marriage
- Open Mines Doctrine
- Open Mortgage
- Open Mortgage Clause
- Open Outcry (Securities)
- Open Plea
- Open Primary
- Open Record
- Open Season (Health Care)
- Open Session
- Open Shop
- Open Skies Agreements
- Open Space
- Open Space Meeting
- Open System
- Open Union
- Open Verdict
- Open-End Advance [HUD]
- Open-End Credit
- Open-End Fund
- Open-End Insurance Charge [HUD]
- Open-End Lease
- Open-End Mortgages
- Open-Ended Agreement
- Open-Source License
- Opening Brief
- Opening Price
- Opening Statement
- Opening the Door
- Operably Arranged
- Operate Aircrafts
- Operating a Vehicle Under Influence (OVI)
- Operating A Vessel
- Operating Agreement
- Operating Cash Flow
- Operating Characteristic Curve
- Operating Contractor [Energy]
- Operating Costs for Traffic Monitoring, Management, and Control
- Operating Differential Subsidy
- Operating Environment [Aeronautics and Space]
- Operating Expenses
- Operating Income
- Operating Life [Aeronautics and Space]
- Operating Subsidiary(Banking)
- Operating Under the Influence OUI
- Operating Unit
- Operation Enduring Freedom [OEF]
- Operation Garden Plot
- Operation Hazard [Aeronautics and Space]
- Operation Last Call
- Operation Noble Eagle [ONE]
- Operation of Aircraft
- Operation Peppermint
- Operational Assistance
- Operational Improvement
- Operational Range
- Operational Readiness
- Operational Waste [Maritime Law]
- Operations Management
- Operations Research
- Operatives-(semiskilled)
- Operator (Oil and Gas)
- Operator of a Designated Payment System
- Operis Novi Nuntiatio
- Opiate
- Opined
- Opinio Juris Communis
- Opinio Juris Sive Necessitatis
- Opinion Evidence
- Opinion Letter
- Opinion Letter (Trademark)
- Opinion Rule
- Opinion Testimony
- Opinion Work Product
- Opinions
- Opioid Drug
- Opioid Treatment
- Opportunity Cost
- Opportunity to be Heard
- Opposing Motion
- Opposition Activity
- Opposition Period
- Opposition Proceeding
- Oppositional Defiant Disorder
- Oppression
- Oppressive Child Labor
- Oprah Effect
- OPS
- Opt-Out Clause
- Opt-out Customer
- Optical Storage Media
- Optimal Firm Size
- Optimum Sustainable Population
- Option
- Option (Entertainment Law)
- Option Agreement
- Option ARM
- Option at the Money
- Option Customer
- Option in the Money
- Option out of the Money
- Option Pool
- Option Premium
- Option Pricing Model
- Optional Cash Purchase
- Optional Insurance (Health Care)
- Optional Origin Contracts
- Optional Writ
- Options
- Options Contract
- Oral Argument
- Oral Communication
- Oral Conscious Sedation
- Oral Contract
- Oral Sodomy
- Oral Testimony
- Oral Trust
- ORCA
- Orcinus Libertus
- Ordeal
- Ordeal by Water
- Order
- Order (Banking)
- Order Assessing Civil Penalty [Aeronautics and Space]
- Order Audit Trail System
- Order bill of Lading
- Order Extending Jurisdiction
- Order for Relief [Bankruptcy]
- Order Granting Leave to Amend Complaint
- Order Instrument
- Order Of Authorities
- Order of Business
- Order of Deportation
- Order Of Examination
- Order of Filiation
- Order of Possession
- Order of Protection
- Order Of Signals
- Order of the Coif
- Order of the Day
- Order to Pay [Oil and Gas]
- Order, Resolutions and Votes Clause
- Ordinal Numbers
- Ordinance
- Ordinance and Law Coverage
- Ordinary and Customary Meaning
- Ordinary and Necessary Expense
- Ordinary Annuity
- Ordinary Care (Banking)
- Ordinary Course of Business
- Ordinary Customs Duty
- Ordinary Goods
- Ordinary High Water Mark
- Ordinary Income
- Ordinary Loss
- Ordinary Negligence
- Ordinary Seaman
- Ordinary Shares
- Ordinary-Meaning Rule
- Ore Tenus
- Ore Tenus Rule
- Organ Donation
- Organ Procurement Organization
- Organic Crop
- Organic Farming
- Organic Plan
- Organic Statute
- Organically Produced
- Organization
- Organization (Probate)
- Organization Chart
- Organization of American States
- Organization or Entity Offering a Licensing or Certification Test
- Organization Representing Federal Employees and Other Organizations
- Organization Theory
- Organizational Analysis
- Organizational Behavior
- Organizational Conflict
- Organizational Development
- Organizational Duty
- Organizational Expenses [Internal Revenue]
- Organizational Growth
- Organizational Life Cycle
- Organizational Meeting (Corporate Law)
- Organizational Picketing
- Organizational Science
- Organizational Structure
- Organizational Units Within the Department of Commerce
- Organized Crime
- Organized Crime Conspiracy
- Organized Crime Control Act [OCCA]
- Organized Exchange
- Organized Unit
- Organotin
- Organotin Antifouling Paint Control Act
- Orientation
- Orientation and Mobility
- Origin Principle
- Original Acquisition
- Original Appointment of an Armed Force Member
- Original Bill
- Original Bill in the Nature of a Supplemental Bill
- Original Bond Maturity Date
- Original Check
- Original Classification
- Original Classification Authority
- Original Equipment Manufacturer
- Original Equipment Manufacturer Vehicle
- Original Filing Basis
- Original Issue Discount – OID [Internal Revenue]
- Original Jurisdiction
- Original Negligence
- Original Numismatic Item
- Original of a Writing or Recording
- Original Political Item
- Original Power Of Attorney
- Original Precedent
- Original Promise
- Original Source
- Original Title
- Original Value
- Original Work of Authorship
- Original Writ
- Original-Document Rule
- Original-Package Doctrine
- Originating Component [Customs Duties]
- Originating Depository Financial Institution
- Originating Depository Institution
- Originating House (Underwriting)
- Originating Mortgage Institution
- Originating Mortgagee [HUD]
- Origination Fee
- Origination Point [Mortgage]
- Origination Relationship [Education]
- Origination Service [Banks & Banking]
- Originator
- Ornamentation
- Ornamentation (Trademark)
- Orphan
- Orphan work
- Orthography
- Orthopedic Impairment
- OSHA
- OST
- Ostensible
- Ostracism
- Ostrich Defense
- OTC Margin Stock
- Other Energy-Conserving Components
- Other Import Restriction
- Other Oilseed
- Other Organization
- Other Planned Permanent Living Arrangement (OPPLA)
- Other Protected Veteran
- Other Than Serious Violation
- Other Worker (Immigration)
- Other-Property Rule
- Otherwise Qualified Person
- Ouster
- Ouster by abatement
- Out Crop
- Out of Network Care
- Out of Pocket Expenses
- Out of Pocket Loss
- Out-of-District Placement [Education]
- Out-of-Field Teacher [Education]
- Out-of-Home Care
- Out-of-Pocket Costs (Health Care)
- Out-Of-Pocket Rule
- Out-of-School Youth
- Out-of-Service Order [Transportation]
- Out-of-State Claimant
- Out-of-State LLC
- Outbound Telephone Call
- Outbuilding
- Outcrop
- Outcry Market
- Outcry Witness
- Outdoor Recreation Camp
- Outer Bar
- Outer Continental Shelf
- Outer Continental Shelf Facility
- Outer Continental Shelf Lands Act
- Outer Continental Shelf Source
- Outer Space Treaty
- Outgrant
- Outlaw Strike
- Outlawry
- Outlays (Expenditures)
- Outlays or Expenditures
- Outleasing
- Outlying Areas
- Outlying Possessions of the United States
- Outmigration
- Outpatient
- Outpatient Critical Access Hospital Services
- Outpatient Diagnostic Facility
- Outpatient Facility
- Outpatient Hospital Care
- Outpatient Medical Facility
- Outpatient Physical Therapy Services
- Outpatient Status
- Outplacement
- Output Contract
- Output Document [Education]
- Output Tax
- Outrageous
- Outreach [Education]
- Outreach and Communications Program
- Outright Gift
- Outside Director
- Outside Employment
- Outside Employment Policies - Private Employer
- Outside Employment Policies Public Employer
- Outside Payroll
- Outside Salesperson
- Outside Youth or Community Group [Education]
- Outsource
- Outsourcing
- Outsourcing Agreement
- Outstanding Check(Banking)
- Outstanding Rights
- Outstanding Stock
- Oval Office
- Over Criminalization
- Over Insurance
- Over the Counter
- Over the Counter Stock
- Over-Improvement
- Over-inclusive
- Over-The-Counter [OTC] Market
- Over-the-Counter Derivative Instrument
- Over-the-Road Bus
- Over-the-Road Bus Frontline Employees
- Over-the-Road Bus Transportation
- Over, Short, and Damaged [Transportation]
- Overage Additional Premium
- Overall Liquidity Ratio
- Overbreadth Doctrine
- Overdraft
- Overdue Instrument
- Overdue Support
- Overfishing
- Overhead Expense
- Overheated Economy
- Overissue
- Overlapping Jurisdiction
- Overlying Mortgage
- Overmatched Amount [Small Business Development Centers]
- Overpayment [Oil and Gas]
- Overpayment Debt
- Overrepresentation (Child Welfare)
- Overriding Commission
- Overriding Royalty Interest
- Overrule
- Overruling Precedent
- Oversamessa
- Overseas Air Commerce [Aeronautics and Space]
- Overseas Area
- Overseas Bill of Lading
- Overseas Housing Allowance
- Overseas Military Personnel Charter [Aeronautics and Space]
- Overseas Parole
- Overseas Private Investment Corporation [OPIC]
- Overseas Processing Office
- Overseas Voter
- Oversight Agency for Audit
- Oversman
- Overstay
- Overstreet Law
- Overt Act
- Overtime
- Overtime Hours
- Overtime Pay
- Overtime Premium
- Overtonnaging
- Overvaluation
- Overzealous Prosecution
- Owe
- Owelty
- Own Occupation
- Own-Product Exclusion
- Own-Work Exclusion
- Owned-Property Exclusion
- Owner [Patents]
- Owner in Equity
- Owner Operator
- Owner or Operator of Vessel
- Owner-Employee [Internal Revenue]
- Owner's Equity
- Owners' Agreement
- Ownership
- Ownership-in-Place Theory
- Owning an Interest
- Oxidizing Adulterant
- Oyez
- Ozone Depletion
- Ozone Depletion Factor
- Ozone Layer
- Ozone-Depleting Substance
