/ Dictionary / Index R rebut: Meaning and Definition of Find definitions for: re•but Pronunciation: (ri-but'), [key] — v., -but•ted, -but•ting. —v.t. to refute by evidence or argument. to oppose by contrary proof. —v.i. to provide some evidence or argument that refutes or opposes. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: rebut (Thesaurus) rebus sic stantibus rebuttal Related Content Daily Word Quiz: nonchalant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language