Stifle \Sti"fle\, n. [From {Stiff}.] (Far.) The joint next above the hock, and near the flank, in the hind leg of the horse and allied animals; the joint corresponding to the knee in man; -- called also {stifle joint}. See Illust. under {Horse}. {Stifle bone}, a small bone at the stifle joint; the patella, or kneepan.