Entry 2 senses · 2 variants Webster, 1913 Gomer /gōm'-ẽr/ · Go·mer · IPA /ɡˈoʊmər/ n. n. 01 n. A Hebrew measure. See Homer. 1. A Hebrew measure. See Homer. See: Homer 02 n. A conical chamber at the breech of the bore in heavy ordnance, especially in mortars; -- named after the inventor. 1. A conical chamber at the breech of the bore in heavy ordnance, especially in mortars; -- named after the inventor.(Gun.)