/ Dictionary / Index M moonbeam: Meaning and Definition of Find definitions for: moon•beam Pronunciation: (mn'bēm"), [key] — n. a ray of moonlight. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: moonbeam (Thesaurus) moonball moon-blind Related Content Daily Word Quiz: ablution Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language