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indicator

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noun [countable] American English pronunciation: indicator /ˈɪndɪˌkeɪtər/ 
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singularindicator
pluralindicators
  1. 1
    something that shows you what condition something is in

    economic indicators such as the inflation rate or the exchange rate

    a good/useful/important indicator:

    Time spent in education is a good indicator of social and economic position.

    an indicator of success/performance/quality:

    The test is a reliable indicator of performance if it is carried out correctly.

  2. 2
    a piece of equipment that shows information

    the air-speed indicator

    The copier is ready when the green indicator light is on.

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