Merriam-Webster Logo
SINCE 1828
Menu
×

An Encyclopædia Britannica Company

See What's Trending Now See More Trending Words
1

off-gas

noun \ ˈȯf-ˌgas \

Definition of off-gas

plural off-gases also off-gasses
:a gas that is produced as a by-product of an industrial process or that is given off by a manufactured object or material
  • Refinery off-gases from fluid catalytic cracking could be a source of ethylene.
  • —Predicasts Technology Update

People Are Reading

alt-59e60c9d3e5ea
Trending: McCain: Half-Baked, 'Spurious' Nationalism
tycoon
17 English Words that Come From Japanese
video-title-words-of-the-year-1066
Words of the Year: 1066
alt-59e673567065d
The History of the Word 'Terrorism'

First Known Use of off-gas

1955

2

off-gas

verb, transitive + intransitive

Definition of off-gas

off-gassed; off-gassing
:to give off a typically harmful gas
  • In addition, OSHA intends to amend the hazard communication provisions of the standard to require hazard warning labels for solid materials capable of off-gassing formaldehyde at levels between 0.1 ppm and 0.5 ppm …
  • —Chemical & Engineering News
  • … there have been environmental concerns about the phenol formaldehyde binders used in most engineered-wood products, which can off-gas.
  • —Max Alexander

First Known Use of off-gas

1974

Seen and Heard

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

show hide

Love words? Need even more definitions?

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

WORD OF THE DAY

malign

play

to speak evil of

Get Word of the Day daily email!

TRENDING NOW

  1. spurious of a deceitful nature or quality

  2. righteous We provide an assortment of definitions

  3. Kafkaesque 'A nightmarish quality'

  4. mike "microphone"

  5. moron “a very stupid person”

SEE ALL

BROWSE DICTIONARY

off-gas

Test Your Vocabulary

Forms of Government Quiz

  • knupfer-painting-solon-before-croesus
  • A gerontocracy is rule by:
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Word Winder's CrossWinder

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

TAKE THE QUIZ

Love words? Need even more definitions?

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

Words at Play

alt-59e673567065d
The History of the Word 'Terrorism'

Noah Webster first entered the term in 1840

alt-59e65152518a6
'Regimen' vs. 'Regiment'

The rule of thumb for words about rules

alt-59e50f5a357b4
'Spox' May Go On The Record

From newsroom lingo to the mainstream

alt-59e506c5c02ae
C'mon, Of Course 'Myriad' Is a Noun

For a myriad of reasons

Ask the Editors

video-title-words-of-the-year-1066
Words of the Year: 1066

Or, Why Pig Meat is Called 'Pork' and Cow Meat is Called 'Beef'

payday
How Often Is 'Biweekly'?

Don't get us started on 'bimonthly'

video-irregardless-grammar-peeve-blend-of-the-synonyms-irrespective-and-regardless
Irregardless

It is in fact a real word (but that doesn't mean you should use it).

video-moose-goose-weird-plurals
Weird Plurals

One goose, two geese. One moose, two... moose. What's up with that?

Word Games

knupfer-painting-solon-before-croesus
Forms of Government Quiz

Name that government! Or something like that.

Take the quiz
rembrandt-painting-a-young-scholar-and-his-tutor
Original Meanings Quiz

A quiz for the pedantic and those annoyed by them!

Take the quiz
True or False
True or False?

Test your knowledge - and maybe learn something along the way.

Take the quiz
Word Winder's CrossWinder
Word Winder's CrossWinder

A game of winding words.

Play the game