Entry 5 senses · 4 variants Webster, 1913 Lather /(lăt͟h"ẽr)/ · Lath·er · IPA /ˈlæð.ɚ/ n. v. t. v. i. v. t. 01 n. Foam or froth made by soap moistened with water. 1. Foam or froth made by soap moistened with water. 2. Foam from profuse sweating, as of a horse. 02 v. t. To spread over with lather; as, to lather the face. imp. & p. p. Lathered; p. pr. & vb. n. Lathering 1. To spread over with lather; as, to lather the face. 03 v. i. To form lather, or a froth like lather; to accumulate foam from profuse sweating, as a horse. 1. To form lather, or a froth like lather; to accumulate foam from profuse sweating, as a horse. 04 v. t. To beat severely with a thong, strap, or the like; to flog. 1. To beat severely with a thong, strap, or the like; to flog.[Low]