Added 9 October 2026 pom-pom noun Categories: ThingsObscure Words noun ! Definition from WordNet 3.1, Princeton University. More about pom-pom at Wordnik → Where our words come from → Decoration consisting of a ball of tufted wool or silk; usually worn on a hat. Artillery designed to shoot upward at airplanes. Origin Imitative. From Wiktionary, via Kaikki.org (CC BY-SA) Related Words: flakack-ackantiaircraftpomponpompoonpumpgun Back to today's word