/ Dictionary / Index A Acadia National Park: Meaning and Definition of Find definitions for: Aca'dia Na'tional Park' Pronunciation: [key] a national park in Maine, on Mount Desert Island. 44 sq. mi. (114 sq. km). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Acadian Acadian flycatcher Related Content Daily Word Quiz: wary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language