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[buh-rom-i-ter] /bəˈrɒm ɪ tər/
Meteorology. any instrument that measures atmospheric pressure.
anything that indicates changes.
1655-65; baro- + -meter
Related forms
[bar-uh-me-trik] /ˌbær əˈmɛ trɪk/ (Show IPA),
barometrical, adjective
barometrically, adverb Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples for barometers
  • Aneroid barometers sold for domestic use seldom go to the trouble.
British Dictionary definitions for barometers


an instrument for measuring atmospheric pressure, usually to determine altitude or weather changes
anything that shows change or impending change the barometer of social change
Derived Forms
barometric (ˌbærəˈmɛtrɪk), barometrical, adjective
barometrically, adverb
barometry, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for barometers
1660s, from Gk. baros "weight" (from barys "heavy;" see grave (adj.)) + metron "measure" (see meter (2)). Probably coined (and certainly popularized) by English scientist Robert Boyle (1627-1691).
Online Etymology Dictionary, © 2010 Douglas Harper
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barometers in Science
An instrument for measuring atmospheric pressure. Barometers are used in determining height above sea level and in forecasting the weather. The two primary types of barometers are the aneroid and the mercury barometer.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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barometers in Culture

barometer definition

An instrument that measures atmospheric pressure.

Note: In general, when the barometer falls in response to a drop in pressure, bad weather is approaching; when the barometer rises because of an increase in pressure, good weather will follow.
The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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