First Known Use: 1960
Dictionary
kook
noun \ˈkük\
: a person whose ideas or actions are very strange or foolish
Full Definition of KOOK
: one whose ideas or actions are eccentric, fantastic, or insane : screwball
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Origin of KOOK
by shortening & alteration from cuckoo
Related to KOOK
KOOK Defined for Kids
kook
noun \ˈkük\
Definition of KOOK for Kids
: a person who acts in a strange or insane way
— kooky \ˈkü-kē\ adjective
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