/ Dictionary / Index M Muir: Meaning and Definition of Find definitions for: Muir Pronunciation: (myoor), [key] 1887–1959, English poet. 1838–1914, U.S. naturalist, explorer, and writer; born in Scotland. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: muir (Thesaurus) Muhlenberg Muir Glacier Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language