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English definition of “against”

against

preposition
 
 
/əˈɡenst/
NOT AGREE B2 disagreeing with a plan or activity: Andrew wants to change offices but I'm against it. There were 70 votes for the new proposal and 30 against.Opposing and against
COMPETE A2 competing with or opposing someone or something: Liverpool is playing against AC Milan. the fight against racismOpposing and against
TOUCH A2 touching something: Push the bed against the wall.Next to and beside
PROTECT protecting you from something bad: Fresh fruit in the diet may protect against cancer.Defending and protectingBacking, supporting and defendingPreserving and saving
OPPOSITE DIRECTION B1 in the opposite direction to the way something is moving: I was cycling against the wind.Through, across, opposite and against
against the law/the rules B2 forbidden by a law or by rules: It's against the law to leave young children alone in the house.Obeying and breaking the lawObedient and compliantDisobedientBad and wrong behaviour
against sb's advice/wishes, etc If you do something against someone's advice, wishes, etc, you do it although they have said you should not or must not: He flew there against his doctor's advice.Neglecting and ignoringNot paying attentionTreating as unimportant
have sth against sb/sth to have a reason not to like someone or something: I have nothing against him personally, I just don't think he's the right man for the job.Opposing and against
(Definition of against from the Cambridge Learners Dictionary © Cambridge University Press)
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