ground speed Meaning in the Cambridge English Dictionary
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Meaning of “ground speed” in the English Dictionary

"ground speed" in British English

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ground speednoun [C usually singular]

uk   us   specialized
An aircraft's ​groundspeed is ​itsspeed when ​measured against the ​groundrather than the ​air through which it ​moves.
(Definition of ground speed from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)
Translations of “ground speed”
in Chinese (Simplified) 地速(指飞机飞行时相对于地面的水平速度)…
in Chinese (Traditional) 地速(指飛機飛行時相對於地面的水準速度)…
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