/ Dictionary / Index T tristate: Meaning and Definition of Find definitions for: tri•state Pronunciation: (trī'stāt"), [key] — adj. pertaining to a territory made up of three adjoining states: a tristate league. pertaining to the three adjoining parts of such states: the tristate region of Missouri, Kansas, and Nebraska. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Tristan und Isolde* triste* Related Content Daily Word Quiz: placid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language