ther·mo·stat
ˈthər-mə-ˌstat 
: an automatic device for regulating temperature (as by controlling the supply of gas or electricity to a heating apparatus)
also
: a similar device for actuating fire alarms or for controlling automatic sprinklers
thermostated
ˈthər-mə-ˌsta-təd
also thermostatted; thermostating also thermostatting
also thermostatted; thermostating also thermostatting
: to provide with or control the temperature of by a thermostat
Examples of thermostat in a Sentence
Noun
I set the thermostat to 68 degrees.
Recent Examples on the Web
Kate McGregor, Architectural Digest, 8 Oct. 2025
Turning down the thermostat and remote work Andrea Donsky, a nutritionist and co-founder of Morpheus, a menopause supplement and vitamin company, says companies need to do more.
—Laura Trujillo, USA Today, 7 Oct. 2025
Continuing to unlock the secrets of immune regulation can help lead to a future where the immune system can be precisely tuned like a thermostat – whether to turn it down in autoimmunity or rev it up against cancer.
—Aimee Pugh Bernard, The Conversation, 6 Oct. 2025
But there’s still a lot to make heat pumps better–closing up leaks in heat exchangers, controlling the speed of compressors, setting up defrosters to only defrost when needed, and even testing out how placing thermostats and other equipment in the home can impact a heat pump’s efficiency.
—Sara Kiley Watson, Popular Science, 2 Oct. 2025
See All Example Sentences for thermostat
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Noun
Keep a close eye on your central air usage (even from afar) with a programmable smart thermostat.
—Kate McGregor, Architectural Digest, 8 Oct. 2025
Turning down the thermostat and remote work Andrea Donsky, a nutritionist and co-founder of Morpheus, a menopause supplement and vitamin company, says companies need to do more.
—Laura Trujillo, USA Today, 7 Oct. 2025
Continuing to unlock the secrets of immune regulation can help lead to a future where the immune system can be precisely tuned like a thermostat – whether to turn it down in autoimmunity or rev it up against cancer.
—Aimee Pugh Bernard, The Conversation, 6 Oct. 2025
But there’s still a lot to make heat pumps better–closing up leaks in heat exchangers, controlling the speed of compressors, setting up defrosters to only defrost when needed, and even testing out how placing thermostats and other equipment in the home can impact a heat pump’s efficiency.
—Sara Kiley Watson, Popular Science, 2 Oct. 2025
See All Example Sentences for thermostat
Cite this Entry
“Thermostat.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/thermostat. Accessed 10 Oct. 2025.
Copy CitationMedical Definition
thermostat
1 of 2 noun
ther·mo·stat
ˈthər-mə-ˌstat
1
: an automatic device for regulating temperature (as by controlling the supply of gas or electricity to a heating apparatus)
2
: a piece of apparatus (as a constant-temperature chamber) regulated by a thermostat
thermostat
2 of 2 transitive verb
thermostated
-ˌstat-əd
or thermostatted; thermostating or thermostatting
or thermostatted; thermostating or thermostatting
: to provide with or control the temperature of by a thermostat
a thermostated centrifuge
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