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English definition of “outside”

outside

preposition, adjective, adverb [not gradable] (NOT PART OF SOMETHING)   /ˌɑʊtˈsɑɪd, ˈɑʊtˌsɑɪd/
not within or part of something: I live just outside (of) Baltimore. Cars, movies, and radio linked small towns to the outside world. outside of Outside of means other than or except for: There are few cities outside of Boston, New York, and Chicago where baseball fans get this excited.
(Definition of outside preposition, adjective, adverb (NOT PART OF SOMETHING) from the Cambridge Academic Content Dictionary © Cambridge University Press)
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