Knee  —n. 1 a (often attrib.) Joint between the thigh and the lower leg in humans. B corresponding joint in other animals. C area around this. D lap (sat on his knee). 2 part of a garment covering the knee. —v. (knees, kneed, kneeing) 1 touch or strike with the knee (kneed him in the groin). 2 colloq. Make (trousers) bulge at the knee.  bring a person to his (or her) knees reduce a person to submission. [old english]