ba‧rom‧e‧ter /bəˈrɒmətə, bəˈrɒmɪtə $ -ˈrɑːmətər/ 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

[TahlilGaran] Dictionary of Contemporary English ▲

barometer
noun
I. instrument that measures air pressure
ADJ. aneroid, digital | high, low | steady The barometer has been steady for three days now.
VERB + BAROMETER check, read | tap He tapped the barometer and noted where the needle was pointing.
BAROMETER + VERB rise | drop, fall

[TahlilGaran] Collocations Dictionary ▲

barometer
II. sth that shows the state of sth
ADJ. accurate, good, reliable, sensitive, useful Infant mortality is a highly sensitive barometer of socio-economic conditions.
political
PREP. ~ of

[TahlilGaran] Collocations Dictionary ▲