/ Dictionary / Index N nonself: Meaning and Definition of Find definitions for: non•self Pronunciation: (non self'), [key] — n. Immunol. any antigen-bearing foreign material that enters the body and normally stimulates an attack by the body's immune system (distinguished from self&hasp;). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. nonsectarian nonself-antigen 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