/ Dictionary / Index T tun: Meaning and Definition of Find definitions for: tun Pronunciation: (tun), [key] — n., v., tunned, tun•ning. —n. a large cask for holding liquids, esp. wine, ale, or beer. a measure of liquid capacity, usually equivalent to 252 wine gallons. —v.t. to put into or store in a tun or tuns. Tun. Pronunciation: [key] Tunisia. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: tun (Thesaurus) tumulus tuna Related Content Daily Word Quiz: benevolent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language