Definition of safety valve noun from the Oxford Advanced Learner's Dictionary


    safety valve

    BrE BrE//ˈseɪfti vælv//
    ; NAmE NAmE//ˈseɪfti vælv//
    How machines work
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  1. 1a device that lets out steam or pressure in a machine when it becomes too great See related entries: How machines work
  2. 2a harmless way of letting out feelings of anger, excitement, etc. Exercise is a good safety valve for the tension that builds up at work.
See the Oxford Advanced American Dictionary entry: safety valve