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English definition of “ground”

ground

verb     /ɡraʊnd/
be grounded If a vehicle that travels on water or in the air is grounded, it cannot or may not leave the ground: The aircraft was grounded by fog .Boats in generalAviationTravelling by aircraftMovement through the air
be grounded in sth formal to be based firmly on something: Fiction should be grounded in reality .Being based on or depending on somethingOrigins and sources
(Definition of ground verb from the Cambridge Learner's Dictionary © Cambridge University Press)

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