Entry 2 senses · 2 variants Webster, 1913 Warner /wôr'-nẽr/ · Warn·er · IPA /ˈwɔː(ɹ)nə(ɹ)/ n. n. 01 n. One who warns; an admonisher. 1. One who warns; an admonisher. 02 n. A warrener. 1. A warrener.[Obs.]