/ Dictionary / Index D defunct: Meaning and Definition of Find definitions for: de•funct Pronunciation: (di-fungkt'), [key] — adj. no longer in effect or use; not operating or functioning: a defunct law; a defunct organization. no longer in existence; dead; extinct: a defunct person; a defunct tribe of Indians. —n. the dead person referred to: the survivors of the defunct. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: defunct (Thesaurus) deft defunctive Related Content Daily Word Quiz: belligerent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language