Archaic. a covenant or contract, especially a betrothal, usually completed by a handclasp.
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How to use handfast in a sentence
The issue of “handfast” marriages in Scotland were eligible to be chiefs, and even sometimes claimed under feudal law.
"A Candidatus Theoligiae, your Majesty," answered a handfast threadbare youth one day, when questioned in this manner.History Of Friedrich II. of Prussia, Volume IV. (of XXI.) | Thomas Carlyle
British Dictionary definitions for handfast
an agreement, esp of marriage, confirmed by a handshake
a firm grip
to betroth or marry (two persons or another person) by joining the hands
to grip with the hand
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012