Entry 2 senses · 2 variants Webster, 1913 Coomb · IPA /kuːm/ n. n. 01 n. A dry measure of four bushels, or half a quarter. 1. A dry measure of four bushels, or half a quarter. 02 n. A hollow in a hillside. [Prov. Eng.] See Comb, Combe. 1. A hollow in a hillside. [Prov. Eng.] See Comb, Combe.[Prov. Eng.] See: Comb, Combe