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English definition of “nullify”

nullify

verb [T]
 
 
/ˈnʌlɪfaɪ/ formal
LOSE EFFECT to make something lose its effect: Advances in medicine have nullified the disease's effect.Court cases, orders and decisions
LEGAL to say officially that something has no legal power: The judge could nullify the entire trial.Legislation and law-making
(Definition of nullify from the Cambridge Learners Dictionary © Cambridge University Press)
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