/ Dictionary / Index M molehill: Meaning and Definition of Find definitions for: mole•hill Pronunciation: (mōl'hil"), [key] — n. a small mound or ridge of earth raised up by a mole or moles burrowing under the ground. to exaggerate a minor difficulty. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: molehill (Thesaurus) mole fraction mole plow Related Content Daily Word Quiz: abominable Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language