(Anglo-Saxon: treowth, truth) An agreement to marry, made by mutual promises. As a matrimonial impediment it was practically done away with by the legislation of Pius X, who ruled that such a compact, to have any effect on a proposed marriage to another, must have been made in a written and dated document, signed by both parties and by the pastor or bishop of the place, or at least by two witnesses; and even this formal pledge does not oblige one party to marry the other.