Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

thermos

play
noun ther·mos \ˈthər-məs\

Simple Definition of thermos

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

Source: Merriam-Webster's Learner's Dictionary

Full 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 of thermos

from Thermos, a trademark


First Known Use: 1907

Rhymes with thermos


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




Learn More about thermos


Seen and Heard

What made you want to look up thermos? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

to defraud especially of money

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image567572573

Which of these is a synonym of unctuous?

angry prompt maudlin oily
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ