- Enter a word for the dictionary definition.
From The Collaborative International Dictionary of English v.0.48:
Kneejoint \Knee"joint`\, n. 1. The joint of the knee. [1913 Webster] 2. (Mach.) A toggle joint; -- so called because consisting of two pieces jointed to each other end to end, making an angle like the knee when bent. [1913 Webster]