/ Dictionary / Index S superinfection: Meaning and Definition of Find definitions for: su•per•in•fec•tion Pronunciation: (s'pur-in-fek"shun), [key] — n. Pathol. marked proliferation of a parasitic microorganism during antimicrobial treatment for another infection. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: superinfection (Thesaurus) superinduce superinflation Related Content Daily Word Quiz: procrastinate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language