American English

Definition of deal-breaker noun from the Oxford Advanced American Dictionary



(also deal breaker) noun
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something that causes someone to reject a deal in politics or business The candidate's support for the war is the deal-breaker (= people will not vote for the candidate because of it). I would have bought the house, but the small backyard was the deal-breaker for me.
See the Oxford Advanced Learner's Dictionary entry: deal-breaker