Latin for towards the same (literally, meeting of the minds. Also referred to as mutual agreement, mutual assent or simply ad idem).

A phrase that indicates agreement by parties to a transaction. In other words, ad idem means that the parties to a transaction are in agreement. If the parties to a contract perceive the terms and conditions of the contract in the same manner, then it is said that the parties are “ad idem” on the terms and conditions. Such an agreement is key to a valid contract, and is one of the essential elements that constitute a contract.

Meeting of the minds (ad idem) is used in contract law to clarify the intentions of the parties forming the contract. Specifically, it implies the existence of a common understanding in the formation of the contract, which is initiated with a proposal or offer.