/ Dictionary / Index M muzzleloader: Meaning and Definition of Find definitions for: muz•zle•load•er Pronunciation: (muz'ul-lō"dur), [key] — n. a firearm that is loaded through the muzzle. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. muzzle muzzler Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language