Entry 2 senses · 2 variants Webster, 1913 Chaun · IPA /t͡ʃɔːn/ n. v. t. & i. 01 n. A gap. 1. A gap.[Obs.] 02 v. t. & i. To open; to yawn. 1. To open; to yawn.[Obs.] “O, chaun thy breast.” — Marston.