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: a container (such as a bottle or jar) with a vacuum between an inner and outer wall used to keep material and especially liquids either hot or cold for considerable periods
Examples of thermos in a Sentence
Recent Examples on the Web
The daughter tells her mother to ask the little doctor if her father can at least have sips of the hot water that her mother brings dutifully each day in a thermos.
—Weike Wang, The Atlantic, 26 Oct. 2024
From over a moat and under a tall gate, the heavy wooden teahouse appears with its black-tiled roof and upturned eaves, along with the sound of Mr. Yang’s clanging thermoses.
—Ann Scott Tyson, The Christian Science Monitor, 13 Aug. 2024
As for sustainability, the property minimizes disposables and single-use plastic with bulk dispensers in the shower, coffee deliveries in insulated thermoses, and complete dishware and cutlery in each kitchenette.
—Lila Battis, Travel + Leisure, 10 Aug. 2024
Loading your audio article Cops are hunting the creep who hurled a racist insult at an Asian man before bashing him in the head with a thermos in Manhattan, cops and police sources said.
—Emma Seiwell, New York Daily News, 29 June 2024
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Word History
Etymology
from Thermos, a trademark
First Known Use
1907, in the meaning defined above
Dictionary Entries Near thermos
Cite this Entry
“Thermos.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/thermos. Accessed 16 Nov. 2024.
Kids Definition
thermos
noun
ther·mos
ˈthər-məs
: a container (as a bottle) with a vacuum between an inner and an outer wall used to keep material (as liquids) hot or cold
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