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
Lauren Mowery, Forbes.com, 10 Sep. 2025
As for energy efficiency, residents can ensure thermostats are working correctly to avoid unnecessary use of electricity for air conditioning.
—Presley Bo Tyler, USA Today, 8 Sep. 2025
Below the clock’s face, however, there’s both a thermostat and a 60-minute timer to help ensure your food is cooked perfectly every time.
—Alicia Geigel, Southern Living, 5 Sep. 2025
Smart devices such as security cameras, thermostats and speakers can be taken over and used for spying or as part of larger cyberattacks.
—Kurt Knutsson, FOXNews.com, 4 Sep. 2025
See All Example Sentences for thermostat
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Noun
Upgrades across the hotel have introduced motion-sensor lighting, water-saving fixtures, digital thermostats, and refillable glass bottles, part of a larger effort to reduce carbon output.
—Lauren Mowery, Forbes.com, 10 Sep. 2025
As for energy efficiency, residents can ensure thermostats are working correctly to avoid unnecessary use of electricity for air conditioning.
—Presley Bo Tyler, USA Today, 8 Sep. 2025
Below the clock’s face, however, there’s both a thermostat and a 60-minute timer to help ensure your food is cooked perfectly every time.
—Alicia Geigel, Southern Living, 5 Sep. 2025
Smart devices such as security cameras, thermostats and speakers can be taken over and used for spying or as part of larger cyberattacks.
—Kurt Knutsson, FOXNews.com, 4 Sep. 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 13 Sep. 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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