/ Dictionary / Index M musher: Meaning and Definition of Find definitions for: mush•er Pronunciation: (mush'ur), [key] — n. Alaska and Northern Canada. a person who competes in cross-country races with dog team and sled. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: musher (Thesaurus) mush mushhead Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language