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English definition of “in”

in

preposition, adverb [not gradable] (WITHIN)   /ɪn/
positioned inside or within the limits of something, or contained, surrounded, or enclosed by something: There’s a cup in the cabinet. Anne is still in bed. Don’t stand in the driveway. He’s always looking at himself in the mirror. Clarice lives in Orlando. He was in prison (= a prisoner). Erika is still in school (= still a student). He has a pain in his shoulder. in and out If you are in and out of a place, you go there and leave, often repeatedly: Since the accident, she’s been in and out of the hospital several times.
(Definition of in preposition, adverb (WITHIN) from the Cambridge Academic Content Dictionary © Cambridge University Press)
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