1. A contract or agreement involving mutual promises. [Cases: Contracts 57. C.J.S. Contracts §§ 108–109.]
2. An agreement to marry; the period after which a couple has agreed to marry but before they do so. — Also termed (in sense 2) betrothal; betrothment. [Cases: Breach of Marriage Promise
1. C.J.S. Breach of Marriage Promise § 3.]