Definition of pressure cooker noun from the Oxford Advanced American Dictionary

     

    pressure cooker

     noun
    noun
     
     
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  1. 1 a strong metal pot with a tight lid, that cooks food quickly by steam under high pressure
  2. 2a situation that is difficult or dangerous because people are likely to become anxious or violent I needed to get away from the pressure cooker atmosphere of the campus during finals week. They performed wonders in keeping the lid on the pressure cooker of a rapidly rising jail population.
See the Oxford Advanced Learner's Dictionary entry: pressure cooker