Source : Webster's Revised Unabridged Dictionary (1913)

Feu \Feu\, n. [See 2d {Feud}, and {Fee}.] (Scots Law)
   A free and gratuitous right to lands made to one for service
   to be performed by him; a tenure where the vassal, in place
   of military services, makes a return in grain or in money.
   --Burrill.