/ Dictionary / Index M moonrock: Meaning and Definition of Find definitions for: moon•rock Pronunciation: (mn'rok"), [key] — n. a sample of lunar material. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. moonrise moonroof Related Content Daily Word Quiz: resilient Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language