/ Dictionary / Index I Isle Royale: Meaning and Definition of Find definitions for: Isle' Roy'ale Pronunciation: (roi'ul), [key] an island in Lake Superior: a part of Michigan; a national park. 208 sq. mi. (540 sq. km). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Isle of Wight islet Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language