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English definition of “be on another planet”

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be on another planet

informal
to not give attention to what is happening around you and to think differently from other people: Some days that girl seems as if she's on another planet.
Translations of “be on another planet”
in Chinese (Traditional) 像是生活在另一個星球,怪異…
in Chinese (Simplified) 像是生活在另一个星球,怪异…
(Definition of be on another planet from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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