thermos

noun

ther·​mos ˈthər-məs 

: a container (such as a bottle or jar) with a vacuum between an inner and outer wall used to keep material and especially liquids either hot or cold for considerable periods

Examples of thermos in a Sentence

Recent Examples on the Web

The father-and-son duo allegedly offered cash in a coffee thermos to an unidentified Antioch councilmember in an attempt to secure a vote in favor of a different housing development known as the Aviano project. —Hema Sivanandam, Mercury News, 6 Nov. 2025

But nothing keeps you warmer than pouring boiling hot water into a thermos. —Adrienne So, Wired News, 18 Oct. 2025

Think an interior laptop pocket, adjustable padded straps, a zippered front pocket, and easy-access side pockets, ideally for a thermos and umbrella. —Katie Jackson, Travel + Leisure, 12 Oct. 2025

The Grosche Stella moka pot comes in an ultra sleek four-cup size stainless steel vessel that embodies something like a thermos. —Yelena Moroz Alpert, Architectural Digest, 10 Oct. 2025

Word History

Etymology

from Thermos, a trademark

First Known Use

1907, in the meaning defined above

Rhymes for thermos

• dermis
• vermis
• endodermis
• epidermis
• hypodermis

Kids Definition

thermos

noun

ther·​mos ˈthər-məs 

: a container (as a bottle) with a vacuum between an inner and an outer wall used to keep material (as liquids) hot or cold