thermos

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noun ther·mos \ˈthər-məs\

Definition of thermos

  1. :  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

Recent Examples of thermos from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'thermos'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of thermos

from Thermos, a trademark


First Known Use: 1907


THERMOS Defined for English Language Learners

thermos

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noun

Definition of thermos for English Language Learners

  • : a container that keeps liquids hot or cold for long periods of time


THERMOS Defined for Kids

thermos

play
noun ther·mos \ˈthər-məs\

Definition of thermos for Students

  1. :  a container (as a bottle or jar) that has a vacuum between an inner and an outer wall and is used to keep liquids hot or cold for several hours



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