Definition of high pressure noun from the Oxford Advanced American Dictionary

     

    high pressure

     noun
    noun
     
    [uncountable]
     
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  1. 1the condition of air, gas, or liquid that is kept in a small space by force Water is forced through the pipes at high pressure.
  2. 2a condition of the air which affects the weather, when the pressure is higher than average The rain will be followed by warmer, drier weather as areas of high pressure move in. compare low pressure
See the Oxford Advanced Learner's Dictionary entry: high pressure

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