A more thorough explanation:

Resolutory is an adjective that describes something that causes an end or termination.

• A resolutory clause in a contract means that the contract will end when a certain condition is met.
• A resolutory condition in a lease agreement means that the lease will end if the tenant fails to pay rent.

These examples illustrate how a resolutory clause or condition can bring an end to a contract or agreement. It is important to understand the terms of any agreement to know if there are any resolutory clauses or conditions that could affect the duration of the agreement.