/ Dictionary / Index M mountain bluebird: Meaning and Definition of Find definitions for: moun'tain blue'bird Pronunciation: [key] a bluebird, Siala currucoides, of western North America. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mountain bike mountain bluet Related Content Daily Word Quiz: maritime Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language