Definition of lather

• n. - Foam or froth made by soap moistened with water.
• n. - Foam from profuse sweating, as of a horse.
• n. - To spread over with lather; as, to lather the face.
• v. i. - To form lather, or a froth like lather; to accumulate foam from profuse sweating, as a horse.
• v. t. - To beat severely with a thong, strap, or the like; to flog.