Added 9 October 2026 knuckles /ˈnʌkəlz/ noun Categories: ThingsRare Words noun ! Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about knuckles at Wordnik → Where our words come from → (used in the plural) a small metal weapon; worn over the knuckles on the back of the hand. Related Words: knuckslashingsbrassdigitsarticulationsfingersfingertipsjointspinkies Back to today's word