knee: hinge joint in the human leg connecting the tibia and fibula with the femur and protected in front by the patella
hinge joint: a freely moving joint in which the bones are so articulated as to allow extensive movement in one plane
buddhism: the teaching of Buddha that life is permeated with suffering caused by desire, that suffering ceases when desire ceases, and that enlightenment obtained through right conduct and wisdom and meditation releases one from desire and suffering and rebirth