Added 10 October 2026 knothole noun Categories: NatureObscure Words noun ! Definition from WordNet 3.1, Princeton University. More about knothole at Wordnik → Where our words come from → A hole in a board where a knot came out. Origin From knot + hole. From Wiktionary, via Kaikki.org (CC BY-SA) Related Words: upshotknarlknagbirdeyefermepostholestumpholeboringstakeholepotholeburrholeknare Back to today's word