Definition of "knee" []

• The joint between the thigh and the lower leg, formed by the articulation of the femur and the tibia and covered anteriorly by the patella. (noun)
• The region of the leg that encloses and supports this joint. (noun)
• An analogous joint or part of a leg of a quadruped vertebrate. (noun)
• Something resembling the human knee, such as a bent piece of pipe. (noun)
• The part of a garment, as of trousers, that covers the knee. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Now I am not accusing you of saying that either…I am just cautioning you on the overuse and applicability of the term knee jerk."
• "Jeanne Garofalo (ph) and Michael Moore are far left fringe whackos that each personify the term knee jerk liberals."
• "Crosby said Monday her knee is at 90 percent and that she expects to receive clearance to fully participate in practice at some point next week."