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English definition of “nullify”

nullify

verb [T]     /ˈnʌlɪfaɪ/
LAW to make a legal agreement or decision no longer have any legal force: The airline wants to nullify employees' contracts if no settlement is reached.
to cause something to have no value or effect: A suit has been filed against the directors, charging them with conspiring to nullify a shareholder vote. The US stated that any reductions in greenhouse gases by the West must not be nullified by increased emissions from developing nations.
nullification noun [U]
(Definition of nullify verb from the Cambridge Business English Dictionary © Cambridge University Press)
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