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thermos

American  
[thur-muhs] / ˈθɜr məs /

noun

  1. a vacuum bottle or similar container lined with an insulating material, such as polystyrene, to keep liquids hot or cold.

Thermos British  
/ ˈθɜːməs /

noun

  1. a type of stoppered vacuum flask used to preserve the temperature of its contents See also Dewar flask

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of thermos

First recorded in 1905–10; formerly a trademark

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The base fits in cupholders; the handle makes it easier to sip from a heavy thermos while multitasking.

From Slate • Jan. 18, 2024

She drives a 10-year-old Prius, brings a thermos of coffee to work instead of patronizing a place with baristas, and takes advantage of a drive-through food pantry once a month.

From New York Times • Jan. 6, 2024

She was seen entering the courthouse on Tuesday morning wearing a blue baseball cap and sunglasses, and carrying a blue thermos.

From Reuters • Oct. 10, 2023

There's Barbie T-shirts, stationary sets, enamel pin sets, sunglasses and even a limited edition Barbie lunchbox and thermos set.

From Salon • Aug. 5, 2023

The old man signaled to Garikayi, who quickly produced cups and a thermos of sweet milky tea.

From "A Girl Named Disaster" by Nancy Farmer

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.