Breadcrumb Home > Dictionary > Index I infective: Meaning and Definition of Find definitions for: in•fec•tive Pronunciation: (in-fek'tiv), [key] — adj. infectious. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: infective (Thesaurus) infectious mononucleosis infecund ✖ Related Content Daily Word Quiz: supercilious Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language