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English definition of “barometer”

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barometer

noun [C] uk   /bəˈrɒm.ɪ.tər/ us    /-ˈrɑː.mɪ.t̬ɚ/
a device that measures air pressure and shows when the weather is likely to change something that can show how a particular situation is developing, or how people's opinions on a particular matter are changing: This survey is considered to be a reliable barometer of public opinion.
barometric
adjective /ˌbær.əʊˈmet.rɪk/ us  /ˌber.oʊ-/
(Definition of barometer from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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