noun
thermos
THUR-mos
Thermos (noun) means an insulated flask that keeps drinks or food hot or cold. Example: “She packed a thermos of coffee for the road trip.”
noun
1
An insulated flask that keeps drinks or food hot or cold.
"She packed a thermos of coffee for the road trip."
How to use thermos
Learner’s notesIn plain EnglishA vacuum-sealed flask that keeps drinks hot or cold for hours.
Common mistake
Originally a brand name; now used generically for any insulated flask, similar to "hoover" for vacuum cleaners.
Common pairings
a thermos of tea
thermos flask
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Word forms
- Plural
- thermoses, thermoi
Fill the gap
Can you complete this real example?
She packed a _____ of coffee for the road trip.
Etymology
Originally a trademark, from Greek thermos ("warm, hot").
Synonyms
View more →
thermos flask
thermos bottle
Frequently asked questions
What does “thermos” mean?
The word “thermos” means an insulated flask that keeps drinks or food hot or cold. In plain terms, a vacuum-sealed flask that keeps drinks hot or cold for hours.
How do you pronounce “thermos”?
“Thermos” is pronounced THUR-mos (/ˈθɝ.məs/ in IPA).
How do you use “thermos” in a sentence?
Here is “thermos” used in a sentence: “She packed a thermos of coffee for the road trip.”
What part of speech is “thermos”?
“Thermos” is a noun.
Where does the word “thermos” come from?
The word “thermos” comes from Greek. Originally a trademark, from Greek thermos ("warm, hot").
