n. A contract preceding another; especially (Law), a contract of marriage which, according to the ancient law, rendered void a subsequent marriage solemnized in violation of it. Abbott. [ 1913 Webster ]

v. i. To make a previous contract or agreement. Ayliffe. [ 1913 Webster ]

v. t. [ imp. & p. p. Precontracted; p. pr. & vb. n. Precontracting. ] To contract, engage, or stipulate previously. [ 1913 Webster ]