handfast noun 2verb 2adjective 2forms 5 noun2 •(no longer used) A contract, agreement, covenant; specifically betrothal, espousal. •(no longer used) A hold, grasp; custody, power of confining or keeping.And the remembrancer of her to hold The hand-fast to her lord. I have given him that — 1611 verb2 •To pledge; to bind. •(Scotland) To betroth by joining hands, in order to allow for cohabitation before the celebration of marriage; to marry provisionally. adjective2 •(rare) Strong; steadfast. •(no longer used) Fast by contract; betrothed by joining hands.A vyrgine made handfast to Christ. — 1546 formshandfasted · handfasting · handfasts · more handfast · most handfast