- The definition of kookiest is the silliest or craziest.
An example of kookiest used as an adjective is in the phrase "the kookiest costume at the party," which means the most unusual costume at the party.
Will these costumes be judged the kookiest at the party?Licensed from iStockPhoto
Variant of kooky
☆ or kookie
- kookiness noun
Used by arrangement with John Wiley & Sons, Inc.