ba ‧ rom ‧ e ‧ ter /bəˈrɒmətə, bəˈrɒmɪtə $ -ˈrɑːmətər/ BrE AmE noun [countable]
[ Date: 1600-1700 ; Language: Greek ; Origin: baros 'weight, pressure' + English -meter ]
1 . an instrument that measures changes in the air pressure and the weather, or that calculates height above sea level
2 . something that shows any changes that are happening in a particular situation:
The skin is an accurate barometer of emotional and physical health.
—barometric /ˌbærəˈmetrɪk◂/ adjective [only before noun]
—barometrically /-kli/ adverb