Definition of thermos
: 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
The New Orleans artist makes his one-of-a-kind sculptures out of the detritus found at flea markets and thrift stores, such as flashlights and thermoses.
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
Definition of thermos for English Language Learners
: a container that keeps liquids hot or cold for long periods of time
THERMOS Defined for Kids
Definition of thermos for Students
: 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
Seen and Heard
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