kneecapPronunciation: /ˈniːkap/Translate kneecap | into French | into German | into Italian | into Spanish Definition of kneecap noun the convex bone in front of the knee joint; the patella. verb (kneecaps, kneecapping, kneecapped) [with object] shoot (someone) in the knee or leg as a form of punishment: (as noun kneecapping)petty crimes are punished by kneecappingkneecap in other Oxford dictionaries Definition of kneecap in the US English dictionary