/ Dictionary / Index H Haleakala National Park: Meaning and Definition of Find definitions for: Ha'leakala' Na'tional Park' Pronunciation: [key] a national park on Maui, Hawaii: site of 21-mi. (34-km) diameter volcanic crater. 43 sq. mi. (111 sq. km). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Haleakala haler Related Content Daily Word Quiz: philanthropy Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language