/ Dictionary / Index M Mauna Kea Observatory: Meaning and Definition of Find definitions for: Mau'na Ke'a Observ'atory Pronunciation: [key] an astronomical observatory on Mauna Kea, Hawaii, situated at an altitude of 13,600 ft. (4145 m). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Mauna Kea mauna loa Related Content Daily Word Quiz: jaundice Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language