Furring (p. pr. & vb. n.) : of Fur
Furring (n.) : The leveling of a surface, or the preparing of an air space, by means of strips of board or of larger pieces. See Fur, v. t., 3.
Furring (v. t.) : The strips thus laid on.
Furring (v. t.) : Double planking of a ship's side.
Furring (v. t.) : A deposit from water, as on the inside of a boiler; also, the operation of cleaning away this deposit.