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English definition of “airspace”

airspace

noun [U]     /ˈeə.speɪs/ US  /ˈer-/
the air or sky above a country that is considered to belong to that country : The government claimed that the plane had illegally entered its airspace.AviationTravelling by aircraftMovement through the airInternational politics and government
(Definition of airspace noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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