Added 4 October 2026 flyweight /ˈflaɪ.weɪt/ noun Categories: PeopleObscure Words noun ! Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about flyweight at Wordnik → Where our words come from → A weight that moves outward depending on centrifugal force. A weight class in many combat sports; e.g. in professional boxing of a maximum of 112 pounds or 50.8 kilograms. Small, light or unimportant. Origin From fly + weight. From Wiktionary, via Kaikki.org (CC BY-SA) Related Words: lightweighthweightdynamicthrow-weightcoupletorque Back to today's word