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Definition of cuckoo

cuckoo

/ˈkʊk.uː/
cuck · oo

Plural:cuckoos
•
Adjective:cuckoo
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cuckoo Lexical Profile

cuckoo Game Scores & Validity

• noun

1

A medium-sized slender bird of the family Cuculidae, globally distributed, noted for its characteristic two-note call and the habit of some species to lay their eggs in the nests of other birds.

Example

"We could hear the distinct call of a cuckoo echoing through the woods on the first morning of spring."


2

An informal term for a crazy, silly, or eccentric person.

Example

"My uncle is a bit of a cuckoo, always inventing strange gadgets in his garage."

Synonyms
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• adjective

1

Crazy, foolish, or mentally unhinged.

Example

"After being trapped in the house for a week during the blizzard, the kids were acting completely cuckoo."

Synonyms
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Word Origin & Etymology

From Middle English 'cuccu', borrowed from Old French 'cucu', an onomatopoeic word imitating the distinctive two-note call of the bird.

Usage Trend

Historical frequency of usage in published text.

180019102020

Cite this Entry


Wordmom. (2026). Definition of Cuckoo. In Wordmom Dictionary. Retrieved Oct 17, 2026, from https://wordmom.com/dictionary/cuckoo
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