thermos
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.”
How to use thermos
Learner’s notesIn plain EnglishA vacuum-sealed flask that keeps drinks hot or cold for hours.
Originally a brand name; now used generically for any insulated flask, similar to "hoover" for vacuum cleaners.
Word forms
thermoses plural, thermoi plural, thermoi plural
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 →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").