defroster
noun
de·frost·er
di-ˈfrȯ-stər 
ˈdē-ˌfrȯ-
plural defrosters
: a person or thing that defrosts something
She was a cook. I was an opener of cans, a defroster of TV dinners.—
Bernie Schiffer
Bernie Schiffer
especially
: a device or system designed to heat a window or windshield of a vehicle for the purpose of removing accumulated ice or moisture
The rear window defroster worked well in the center, but it needs more grid lines for full coverage. —Consumer Reports
Consumer Reports Their breath fogged the windshield immediately, and Gus slowed to a crawl on the winding street, reaching down to adjust the wipers and the defroster. —Frank Conroy
Frank Conroy Examples of defroster in a Sentence
Recent Examples on the Web
Drivers should keep all car windows clear by using a window scraper to remove ice and turning on the windshield wipers and defrosters, even when traveling short distances, according to the Colorado Department of Motor Vehicles.
—Lauren Penington, Denver Post, 3 Dec. 2025
Ensure that the heater and defroster work properly.
—Marina Johnson, IndyStar, 21 Nov. 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
The defroster and defogger system shuts off during certain HVAC system faults, such as electrical compressor failure, due to the programming of the HVAC and ECU software, according to the recall report.
—James Powel, USA Today, 15 Sep. 2025
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Lauren Penington, Denver Post, 3 Dec. 2025
Ensure that the heater and defroster work properly.
—Marina Johnson, IndyStar, 21 Nov. 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
The defroster and defogger system shuts off during certain HVAC system faults, such as electrical compressor failure, due to the programming of the HVAC and ECU software, according to the recall report.
—James Powel, USA Today, 15 Sep. 2025
See All Example Sentences for defroster
Cite this Entry
“Defroster.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/defroster. Accessed 7 Dec. 2025.
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