ad idem

In the context of contract law, the expression ad idem indicates that the parties are of the same mind. That is to say, the parties are in agreement with one another in respect to the terms of that imposed by the contract.

[Latin: To the same]

Usage: The parties to the contract were not ad idem and thus failed to satisfy the requirements to form a legally binding contract.

Related Words: quid pro quo; consenus ad idem.