Meaning of “naive” in the English Dictionary

"naive" in British English

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naiveadjective

also naïve, naïf uk /naɪˈiːv/ us /naɪˈiːv/ mainly disapproving

C1 too willing to believe that someone is telling the truth, that people's intentions in general are good, or that life is simple and fair. People are often naive because they are young and/or have not had much experience of life:

She was very naive to believe that he'd stay with her.
They make the naive assumption that because it's popular it must be good.
It was a little naive of you to think that they would listen to your suggestions.
naively
adverb also naïvely uk /naɪˈiːv.li/ us /naɪˈiːv.li/

I naively believed he was telling the truth.

(Definition of “naive” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"naive" in American English

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naiveadjective

us /nɑˈiv/

too ready to believe someone or something, or to trust that someone’s intentions are good, esp. because of a lack of experience:

It was naive of her to think that she would ever get her money back.

(Definition of “naive” from the Cambridge Academic Content Dictionary © Cambridge University Press)