Dictionary 1. (n.) The glandular organ in which milk is secreted and stored; -- popularly called the bag in cows and other quadrupeds. See Mamma.2. (n.) One of the breasts of a woman. Thesaurus bag boobs bosom breast breasts brisket bust chest crop dug knockers mama mamelon mamelonation mammary gland mammilla mammillation nenes nipple pap papilla pigeon breast teat thorax tit tits titties titty |