Added 9 October 2026 tholepin noun Categories: ThingsObscure Words noun ! Definition from WordNet 3.1, Princeton University. More about tholepin at Wordnik → Where our words come from → A holder attached to the gunwale of a boat that holds the oar in place and acts as a fulcrum for rowing. Origin From thole + pin. From Wiktionary, via Kaikki.org (CC BY-SA) Related Words: pegpinoarlockrowlocktholethowelthimblethumberthumbythiblepoindingthumbhole Back to today's word