: 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 wide-mouth thermos is easy to pour into and has an 8-ounce lid that can be used as a cup.
—
Chaunie Brusie, Rn, Parents, 29 Nov. 2024
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
See all Example Sentences for thermos 
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Chaunie Brusie, Rn, Parents, 29 Nov. 2024
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
See all Example Sentences for thermos
Dictionary Entries Near thermos
Cite this Entry
“Thermos.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/thermos. Accessed 21 Dec. 2024.
Copy CitationKids 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
Love words? Need even more definitions?
Merriam-Webster unabridged
Share