Ouster Law and Legal Definition

Ouster refers to the wrongful dispossession of a rightful owner or tenant of real property, which forces the dispossessed party to bring a lawsuit to regain possession. This often occurs between partners in an enterprise or roommates, when one co-owner or co-tenant forces out the other, changes locks or makes the premises inhabitable. It may also refer to the involuntary removal of someone from a position or office.