Meaning & use
cuckoo
A grayish bird known for laying its eggs in the nests of other bird species.
See it in a sentence
The distinctive call of the cuckoo echoed through the forest each spring.
Farmers traditionally associated the first cuckoo of the year with the arrival of spring.
A note on using this word
Cuckoo is also used informally as an adjective meaning crazy or slightly mad, as in 'he's gone completely cuckoo.'
Words with a similar meaning
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Another way to use it
2. adjective
Crazy, foolish, or slightly mad in behavior or thinking (informal).
Everyone thought his plan to cross the desert on foot was completely cuckoo.
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