thermos

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noun ther·mos \ˈthər-məs\

Definition of thermos

  1. :  a container (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

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 ther·mos \ˈthər-məs\

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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