Definition of barometer noun from the Oxford Advanced Learner's Dictionary

     

    barometer

     noun
    noun
    BrE BrE//ˈrɒmɪtə(r)//
     
    ; NAmE NAmE//ˈrɑːmɪtər//
     
     
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  1. 1an instrument for measuring air pressure to show when the weather will change The barometer is falling (= showing that it will probably rain).
  2. 2something that shows the changes that are happening in an economic, social or political situation Infant mortality is a reliable barometer of socio-economic conditions.
  3. Word Origin mid 17th cent.: from Greek baros ‘weight’ + -meter(see meter).Extra examples Infant mortality is a highly sensitive barometer of socio-economic conditions. The barometer has been steady for three days now. Ownership of cattle was a barometer of status. The skin is an accurate barometer of your state of health. What barometer is there to measure fear and intimidation?
See the Oxford Advanced American Dictionary entry: barometer