/ Dictionary / Index S sororicide: Meaning and Definition of Find definitions for: so•ror•i•cide Pronunciation: (su-rôr'u-sīd", -ror'-), [key] — n. a person who kills his or her sister. the act of killing one's own sister. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sororate sorority Related Content Daily Word Quiz: procrastinate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language