/ Dictionary / Index T Thaddeus: Meaning and Definition of Find definitions for: Thad•de•us Pronunciation: (thad'ē-us), [key] — n. one of the twelve apostles. Matt. 10:3. a male given name: from an Aramaic word meaning “praise.” Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Thackeray thae Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language