/ Dictionary / Index K kook: Meaning and Definition of Find definitions for: kook Pronunciation: (kk), [key] — n. Slang. an eccentric, strange, or foolish person. an insane person. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: kook (Thesaurus) koodoo kookaburra 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