Entry 1 sense Webster, 1913 oesophagus · oe·soph·a·gus · IPA /ɪˈsɑfəɡəs/ 01 n. Same as Esophagus, Esophageal, etc. 1. Same as Esophagus, Esophageal, etc. See: Esophagus, Esophageal