thermos

noun

ther·​mos ˈthər-məs How to pronounce thermos (audio)
: 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
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.
In the city center, 126 public water fountains provide clean drinking water, while reusable thermoses have been distributed to young residents to curb single-use plastic consumption. Emese MacZko, Forbes.com, 7 Apr. 2025 At the risk of indulging in a sort of giddy hyperbole, pretty much every NHL playoff game feels like watching Uncut Gems after drinking a thermos of espresso. Anthony Crupi, Sportico.com, 18 Apr. 2025 This comforting combination is especially popular among hikers and skiers, where a thermos of coffee and a waffle topped with brown cheese is a classic mountain snack. David Nikel, Forbes.com, 5 Apr. 2025 Williams unpacked a thermos and served us a hot—and very sweet—drink made from black-currant syrup. Akash Kapur, Travel + Leisure, 24 Feb. 2025 See All Example Sentences for thermos

Word History

Etymology

from Thermos, a trademark

First Known Use

1907, in the meaning defined above

Time Traveler
The first known use of thermos was in 1907

Browse Nearby Words

Cite this Entry

“Thermos.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/thermos. Accessed 22 May. 2025.

Kids Definition

thermos

noun
ther·​mos ˈthər-məs How to pronounce thermos (audio)
: a container (as a bottle) with a vacuum between an inner and an outer wall used to keep material (as liquids) hot or cold

More from Merriam-Webster on thermos

Last Updated: - Updated example sentences
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