/ Dictionary / Index T tux: Meaning and Definition of Find definitions for: tux Pronunciation: (tuks), [key] — n. Informal. tuxedo. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: tux (Thesaurus) tu-whit tu-whoo tuxedo Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language