Forty Foot Equivalent Unit. A unit of measurement of the cargo carrying capacity of a containership. A 40 ft standard shipping container is equal to one FEU. A related term is TEU, and one FEU is equal to two TEUs.
A feudal holding. To feu is, strictly, to give out land upon a feudal arrangement, whereby the buyer (vassal) holds land of the landowner (superior), often upon condition that he builds on the land and pays a perpetual rent or feuduty. He remains the owner so long as he pays and observes such conditions. A piece of land which is feued is sometimes therefore referred to as a feu.