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English definition of “pre-empt”

pre-empt

verb [T]     /ˌpriːˈempt/
to do something before something else happens in order to prevent it or reduce its effect Preventing and impedingLimiting and restricting
pre-emptive adjective preventing something else from happening : to take pre-emptive action Preventing and impedingLimiting and restricting
(Definition of pre-empt verb from the Cambridge Learner's Dictionary © Cambridge University Press)

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