/ Dictionary / Index U uintathere: Meaning and Definition of Find definitions for: u•in•ta•there Pronunciation: (y-in'tu-thēr"), [key] — n. any hoofed North American mammal of the extinct genus Dinoceras, of the Eocene Epoch, having a massive body and three pairs of horns. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: uintathere (Thesaurus) Uinta Mountains Uisliu Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language