Definitions
1.nounThe flat, roundish bone in the knee.
2.noun(roofing) A metal cover trim that fits over a panel rib after it has been cut and bent.
3.nounA cap or strong covering for the knees, used chiefly for horses, to protect their knees in case of a fall.
4.verbTo destroy the knees of (a person), usually by shooting at the knees, as a punishment carried out by criminals or terrorists.