noun ba·rom·e·ter \bə-ˈrä-mə-tər\

: an instrument that is used to measure air pressure and predict changes in the weather

: something that is used to indicate or predict something

Full Definition of BAROMETER

:  an instrument for determining the pressure of the atmosphere and hence for assisting in forecasting weather and for determining altitude
:  something that indicates fluctuations (as in public opinion) <housing sales and other economic barometers>
:  standard, test <a barometer to measure high school talent — Jeff Fellenzer>
baro·met·ric \ˌber-ə-ˈme-trik, ˌba-rə-\ adjective
baro·met·ri·cal·ly \-tri-k(ə-)lē\ adverb
ba·rom·e·try \bə-ˈrä-mə-trē\ noun

Examples of BAROMETER

  1. <a legendary Broadway flop that has subsequently become the barometer by which failure in the theater is judged>

First Known Use of BAROMETER

circa 1666


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