/ Dictionary / Index M mammary: Meaning and Definition of Find definitions for: mam•ma•ry Pronunciation: (mam'u-rē), [key] — adj. Anat., Zool. of or pertaining to the mamma or breast. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: mammary (Thesaurus) mammalogy mammary artery Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language