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English definition of “preventive”

preventive

adjective [before noun]     /prɪˈven.tɪv/ US  /-t̬ɪv/ (also preventative)
C2 intended to stop something before it happens: In the past ten years, preventive measures have radically reduced levels of tooth decay in children. preventative medicinePreventing and impedingLimiting and restricting
(Definition of preventive adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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