Definition of pain barrier noun from the Oxford Advanced Learner's Dictionary


pain barrier

BrE BrE//ˈpeɪn bæriə(r)//
; NAmE NAmE//ˈpeɪn bæriər//
[usually singular]
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the moment at which somebody doing hard physical activity feels the greatest pain, after which the pain becomes less He broke through the pain barrier at 25 kilometres and went on to win his first marathon.
See the Oxford Advanced American Dictionary entry: pain barrier