Meaning of “negate” in the English Dictionary

"negate" in British English

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negateverb [ T ]

uk /nɪˈɡeɪt/ us /nɪˈɡeɪt/ formal
negation
noun [ U ] uk /nɪˈɡeɪ.ʃən/ us /nɪˈɡeɪ.ʃən/

Grammar

(Definition of “negate” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"negate" in American English

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negateverb [ T ]

us /nɪˈɡeɪt, ˈneɡ·eɪt/

to show something to be wrong or to be the opposite of what was thought, or to cause something to have no effect:

The increase in sales was negated by the rising cost of materials.

(Definition of “negate” from the Cambridge Academic Content Dictionary © Cambridge University Press)