ˈklivɚ ˈheliˌkɔptə(ɹ) ˈhɛl.iˌkɒp.tə(ɹ) ˈhɛlɨˌkɑptɚ a grounder that bounces high in the air a butcher's knife having a large square blade an aircraft without wings that obtains its lift from the rotation of overhead blades informal terms for a human ‘tooth’