foin /fɔɪn/noun 3verb 2forms 3 noun3 •The beech marten (Martes foina, syn. Mustela foina). •A kind of fur, black at the top on a whitish ground, taken from the ferret or weasel of the same name.He came to the stake in a fair black gown furred and faced with foins. — 1642 •(no longer used) A thrust.They move their hands, steadfast their feet remain, / Nor blow nor foin they struck or thrust in vain. — 1600 verb2 •(no longer used) To thrust with a sword; to stab at.And then he flue on hir as he were wood, / And on hir breeche did hack and foyne a-good. — 1593 •(no longer used) To prick; to sting. formsfoined · foining · foins