/ Dictionary / Index D Dinosaur National Monument: Meaning and Definition of Find definitions for: Di'nosaur Na'tional Mon'ument Pronunciation: [key] a national monument in NE Utah and NW Colorado: site of prehistoric animal fossils. 322 sq. mi. (834 sq. km). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. dinosaurian dinothere Related Content Daily Word Quiz: agitated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language