The joint in the middle of your leg.

noun

1. A joint in the middle part of the human leg that is the articulation between the femur, tibia, and patella
2. The tarsal joint of a bird
3. The joint between the femur and tibia of an insect
4. A piece of timber naturally or artificially bent for use in supporting structures coming together at an angle (such as the deck beams of a ship)
5. A rounded or conical process rising from the roots of various swamp-growing trees

   "cypress knee"

6. The part of a garment covering the knee
7. A blow with the bent knee

verb

1. To strike with the knee
2. To bend the knee to

plural noun

1. Breech

adjective

1. Sunk to the knees

   "knee-deep in mud"

2. Deeply engaged or occupied

   "knee-deep in work"

3. Knee-high

adjective

1. Rising or reaching upward to the knees

   "knee-high stockings"

adjective

1. Readily predictable automatic

   "knee-jerk reactions"

noun

1. An involuntary forward kick produced by a light blow on the tendon below the patella

noun

1. An extremely funny joke, line, or story

noun

1. A knee-high sock

idiom

1. Very young and small

   "I haven't seen you since you were knee-high to a grasshopper."