/ Dictionary / Index N nonself-antigen: Meaning and Definition of Find definitions for: non•self-an•ti•gen Pronunciation: (non-self'an"ti-jun, -jen"), [key] — n. Immunol. any of the antigens present in an individual that originate outside the body (contrasted with self-antigen). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. nonself nonsense Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language