/ Dictionary / Index M Mjolnir: Meaning and Definition of Find definitions for: Mjol•nir Pronunciation: (myôl'nir), [key] — n. Scand. Myth. the hammer of Thor, used as a weapon against the Jotuns, heard as thunder by humans. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. M.J. mk. Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language