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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.

They brought books, knitting, thermoses of coffee or something more muscular.

From Los Angeles Times

I clink my water thermos against his iced coffee and my cookie against his.

From Literature

He handed me one and I sat up and poured tea from my thermos into my cup and his and we drank the tea and dunked the cookies and did not talk but just sat.

From Literature

The quay was largely deserted, boats stowed for the night, except for a cluster of men on the quayside, drinking coffee from a thermos.

From Literature

He collects his laptops and his thermos and goes inside, with CPU trotting after him.

From Literature

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.