Laesio Ultra Dimidium Vel Enormi Law and Legal Definition

Laesio ultra dimidium vel enormi is a Latin term used to describe the injury sustained by one of the parties to an onerous contract, when the party had been overreached by the other party to the extent of more than one half of the subject matter. For example, where a vendor had not received half the value of the property sold, or the purchaser had paid more than double value.

For a contract to qualify as an onerous contract, the unavoidable costs of meeting the obligation under the contract should exceed the economic benefits expected to be received under it.