/ Dictionary / Index C conclusive: Meaning and Definition of Find definitions for: con•clu•sive Pronunciation: (kun-kl'siv), [key] — adj. serving to settle or decide a question; decisive; convincing: conclusive evidence. tending to terminate; closing. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: conclusive (Thesaurus) conclusion conclusory Related Content Daily Word Quiz: winsome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language