Added 9 October 2026 mainsheet /ˈmeɪnʃiːt/ noun Categories: ThingsObscure Words noun ! Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about mainsheet at Wordnik → Where our words come from → (nautical) a line (rope or chain) that regulates the angle at which a sail is set in relation to the wind. Origin From main + sheet. From Wiktionary, via Kaikki.org (CC BY-SA) Related Words: tacksheetshroudmainmainboommainyardmainstayafter-sailmaintopmast Back to today's word