Definition of go against phrasal verb from the Oxford Advanced American Dictionary

 

go against

 phrasal verb
phrasal verb
 
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Phrasal Verbs

go against somebody

 
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to not be in someone's favor or not to their advantage The jury's verdict went against him.

go against somebody/something

 
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to resist or oppose someone or something He would not go against his parents' wishes.

go against something

 
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to be opposed to something; to not fit or agree with something Paying for a private room in the hospital goes against her principles. His thinking goes against all logic.
See the Oxford Advanced Learner's Dictionary entry: go against