/ Dictionary / Index A Arches National Park: Meaning and Definition of Find definitions for: Arch'es Na'tional Park' Pronunciation: [key] a national park in E Utah: natural arch formations. 114 sq. mi. (295 sq. km). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. archery archespore Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language