/ Dictionary / Index K kill-joy: Meaning and Definition of Find definitions for: kill-joy Pronunciation: (kil'joi"), [key] — n. a person who spoils the joy or pleasure of others; spoilsport. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: kill-joy (Thesaurus) Killingly kill shot Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language