/ Dictionary / Index M murderous: Meaning and Definition of Find definitions for: mur•der•ous Pronunciation: (mûr'dur-us), [key] — adj. of the nature of or involving murder: a murderous deed. guilty of, bent on, or capable of murder. extremely difficult, dangerous, or unpleasant: murderous heat. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: murderous (Thesaurus) murder one Murders in the Rue Morgue, The* Related Content Daily Word Quiz: nonchalant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language