Definition of thermos in English:

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Pronunciation: /ˈθəːməs/
(also thermos flask, US also thermos bottle)


A vacuum flask.
Example sentences
  • These include her passport, money belt and traveler's checks; pens, notebooks and maps; a Thermos, mug and knife.
  • Their plastic cups came from visitors from a mosque in Swindon who arrived one afternoon with Thermoses of sweet tea and samosas still warm from the oven.
  • On the stage is a lectern, a leather armchair, a potted palm and a table with a Thermos flask: enter the speaker in a beige cardigan.


Early 20th century: from Greek, literally 'hot'.

For editors and proofreaders

Line breaks: ther|mos

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