Entry 3 senses · 2 variants Webster, 1913 Gloam /glōm/ · IPA /ɡlˈoʊm/ v. i. n. 01 v. i. To begin to grow dark; to grow dusky. 1. To begin to grow dark; to grow dusky. 2. To be sullen or morose.[Obs.] 02 n. The twilight; gloaming. 1. The twilight; gloaming.[R.]