/ Dictionary / Index M moonball: Meaning and Definition of Find definitions for: moon•ball Pronunciation: (mn'bôl"), [key] a high lob in tennis. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Moon and Sixpence, The* moonbeam Related Content Daily Word Quiz: entomology Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language