1. an instrument that measures atmospheric pressure, used especially in weather forecasting
2. something that indicates or reflects changes in circumstances, opinions, or conditions
Usage: figurative

Examples

• The barometer showed falling pressure, indicating a storm was approaching.
• She checked the barometer before planning the outdoor wedding.
• The stock market serves as a barometer of economic health.
• Public opinion polls are often seen as a barometer of political sentiment.
• His mood was a reliable barometer of how the meeting had gone.
• The mercury barometer was invented in the 17th century.
• Consumer spending is considered a barometer of economic confidence.