English Reference

Word

barometer

Phoneticsbarom·e·ter

US/bɝˈɑmɪtɝ/

UK/bəɹˈɒmɪtɐ/

Definitions

01weather instrument

C1 · Science

n. a scientific tool used to measure air pressure, which helps people predict if the weather will change.

n. an instrument used to measure atmospheric pressure, primarily for weather forecasting and determining altitude.

“The barometer in the hallway showed that the air pressure was dropping, so we expected rain.”

“Meteorologists monitored the mercury barometer closely, noting the rapid fall in pressure that typically precedes a severe cyclonic storm.”

Technical

Usage

a countable noun often used with the definite article in scientific contexts.

Synonyms

pressure gauge

02a social indicator

C1

n. something that shows how a situation is developing or how people are feeling.

n. a figurative gauge or indicator that reflects changes in public opinion, social trends, or economic conditions.

“The number of new houses being built is a good barometer of the country's economy.”

“Political analysts often view local election results as a reliable barometer of the national mood regarding the current administration's fiscal policies.”

Academic

Usage

frequently used with 'of' to indicate the subject being measured, such as 'a barometer of public opinion'.

Real-World Examples

“Inside, the barometer and compass were coated with a bioluminescent fungus called foxfire so the pilot could make them out in the dark.”
Smithsonian Magazine · 3 Sept 2026
“But Frank Lampard will know that their chances of survival will not rest on this result and next week’s homecoming against Hull should provide more of a barometer of their prospects.”
The Guardian · 21 Aug 2026

Etymology

From baro- + -meter. Coined in 1665 by Robert Boyle as a name for the instrument invented by Torricelli some 20 years earlier; soon thereafter borrowed from English into various languages.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry

Level
C1 · Advanced
Frequency
Occasional
Updated

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English Reference