/ Dictionary / Index M manslaughter: Meaning and Definition of Find definitions for: man•slaugh•ter Pronunciation: (man'slô"tur), [key] — n. the unlawful killing of a human being without malice aforethought. the killing of a human being by another; homicide. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: manslaughter (Thesaurus) man-sized manslayer 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