n. In Scots law: A free and gratuitous right to lands granted to one for service to be performed by him according to the proper tenure thereof; specifically, a right to the use and enjoyment of lands, houses, or other heritable subjects of perpetuity, in consideration of agricultural services or an annual payment in grain or money, called feu-duty, and certain other contingent burdens.n. The land or piece of ground so held; a fief.To make a feu of; vest in one who pays the annual feu-duty.