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English definition of “airspeed”

airspeed

noun [U] uk   /ˈeə.spiːd/ us    /ˈer-/
the speed of an aircraft, measured against the speed of the air through which it is movingSpeed of motionAviationTravelling by aircraftMovement through the air
(Definition of airspeed from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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