nocturnal Meaning in the Cambridge English Dictionary
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Meaning of “nocturnal” in the English Dictionary

"nocturnal" in British English

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nocturnaladjective

uk   /nɒkˈtɜː.nəl/  us   /nɑːkˈtɝː-/ formal
happening in or ​active during the ​night, or ​relating to the ​night: nocturnal ​wanderings nocturnal ​light Most ​bats are nocturnal.
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nocturnally
adverb uk   us   /-i/
(Definition of nocturnal from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"nocturnal" in American English

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nocturnaladjective

 us   /nɑkˈtɜr·nəl/
of the ​night, or ​active during the ​night: Most ​bats and ​owls are nocturnal.
(Definition of nocturnal from the Cambridge Academic Content Dictionary © Cambridge University Press)
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