uppercut Syllabification: (up·per·cut)Pronunciation: /ˈəpərˌkət/Definition of uppercut noun a punch delivered with an upward motion and the arm bent. Baseball an upward batting stroke, typically resulting in a fly ball. verb (uppercuts, uppercutting; past and past participle uppercut) [with object] hit with an uppercut. uppercut in other Oxford dictionaries Definition of uppercut in the British & World English dictionary