/ Dictionary / Index A antigen: Meaning and Definition of Find definitions for: an•ti•gen Pronunciation: (an'ti-jun, -jen"), [key] — n. any substance that can stimulate the production of antibodies and combine specifically with them. any commercial substance that, when injected or absorbed into animal tissues, stimulates the production of antibodies. antigens of a particular type collectively. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: antigen (Thesaurus) antigay antigenic determinant Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language