an instrument for measuring air pressure to show when the weather will change 气压计；气压表；晴雨表 The barometer is falling (= showing that it will probably rain). 气压在下降（表示可能要下雨）。 The barometer has been steady for three days now. 三天来气压值一直很稳定。
Oxford Collocations Dictionaryadjective- aneroid
- check
- read
- tap
- …
- rise
- drop
- fall
- …
something that shows the changes that are happening in an economic, social or political situation （显示经济、社会、政治变化的）晴雨表，标志，指标 Extra ExamplesOwnership of cattle was a barometer of status. 牛的所有权是地位的晴雨表。 The skin is an accurate barometer of your state of health. 皮肤是你健康状况的准确晴雨表。 What barometer is there to measure fear and intimidation? 有什么晴雨表来衡量恐惧和恐吓？
Oxford Collocations Dictionaryadjective- accurate
- good
- reliable
- …
- barometer of
Word Originmid 17th cent.: from Greek baros ‘weight’ + -meter(see meter).