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[thur-muh-stat] /ˈθɜr məˌstæt/
a device, including a relay actuated by thermal conduction or convection, that functions to establish and maintain a desired temperature automatically or signals a change in temperature for manual adjustment.
verb (used with object), thermostatted or thermostated; thermostatting or thermostating.
to equip or control with a thermostat.
Origin of thermostat
First recorded in 1825-35; thermo- + -stat
Related forms
thermostatic, adjective
thermostatically, adverb Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for thermostatting


a device that maintains a system at a constant temperature. It often consists of a bimetallic strip that bends as it expands and contracts with temperature, thus breaking and making contact with an electrical power supply
a similar device that actuates equipment, such as a sprinkler, when a certain temperature is reached
Derived Forms
thermostatic, adjective
thermostatically, adverb
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 thermostatting



1831, from thermo- + -stat.

Online Etymology Dictionary, © 2010 Douglas Harper
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thermostatting in Science
A device that automatically controls heating or cooling equipment in such a way as to maintain a temperature at a constant level or within a specified range, generally using a thermometer capable of triggering electrical switches that activate or deactivate the equipment.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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thermostatting in Culture

thermostat definition

A device that monitors and automatically responds to changes in temperature and activates switches controlling devices such as furnaces or air conditioners.

The 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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