/ Dictionary / Index M McMurdo Sound: Meaning and Definition of Find definitions for: Mc•Mur'do Sound' Pronunciation: (muk-mûr'dō), [key] an inlet of Ross Sea, in Antarctica, N of Victoria Land. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. McMinnville McNair Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language