out·​gas | \ ˈau̇t-ˌgas How to pronounce outgas (audio) , ˌau̇t-ˈgas \
outgassed; outgassing; outgasses

Definition of outgas

transitive verb

1 : to remove occluded gases from usually by heating broadly : to remove gases from
2 : to remove (gases) from a material or a space

intransitive verb

: to lose gases

Examples of outgas in a Sentence

Recent Examples on the Web Loeb concluded that outgassing could not have caused 'Oumuamua's acceleration. Rob Reid, Ars Technica, "Nailing down the nature of ‘Oumuamua—it’s probably a comet, but…," 29 Nov. 2018 The only other possibility is that the vinyl from the car’s dashboard and interior parts is outgassing. Ray Magliozzi, The Seattle Times, "Cloudy windshield could mean bad heater core," 29 Aug. 2017

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

First Known Use of outgas

1919, in the meaning defined at transitive sense 1

Keep scrolling for more

Learn More about outgas

Time Traveler for outgas

Time Traveler

The first known use of outgas was in 1919

See more words from the same year

Statistics for outgas

Cite this Entry

“Outgas.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/outgas. Accessed 18 January 2020.

More from Merriam-Webster on outgas

Rhyming Dictionary: Words that rhyme with outgas

Comments on outgas

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


experienced by way of someone else

Get Word of the Day daily email!

Test Your Vocabulary

The Eponym Quiz

  • rubens painting
  • Which is the best synonym of bowdlerize?
Spell It

Can you spell these 10 commonly misspelled words?

Add Diction

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

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!