/ Dictionary / Index M murderer: Meaning and Definition of Find definitions for: mur•der•er Pronunciation: (mûr'dur-ur), [key] — n. a person who commits murder. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: murderer (Thesaurus) murderee murderess Related Content Daily Word Quiz: voracious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language