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Definitions

cuckoo

[koo-koo, kook-oo] / ˈku ku, ˈkʊk u /


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

"Switzerland has nurtured many unexpected good things -- Albert Einstein's physics, the world economy, and the cuckoo clock leap to mind -- and is again helping the world appreciate improbable people and ideas."

From Barron's • Mar. 10, 2026

‘Periodically, I’ve had chats with neighbors about the heat. Most of the talks have been thoughtful, but some have veered into cuckoo territory,’ writes an L.A.

From Los Angeles Times • Jan. 22, 2026

At Kris Kringl, a downtown shop where “it’s Christmas all year long,” one can find Christmas villages, Christmas-themed cuckoo clocks, Christmas-themed cookie jars, Christmas-themed table runners, “Deck the Halls” tea kettles and much more.

From The Wall Street Journal • Dec. 21, 2025

Nothing about “Another Simple Favor” or its equally cuckoo bananas predecessor, “A Simple Favor,” is subtle.

From Salon • May 3, 2025

She’s a cuckoo, laying her egg in my nest.

From "The Girl on the Train" by Paula Hawkins




Vocabulary lists containing cuckoo