carbon monoxide


Definition of carbon monoxide

: a colorless odorless very toxic gas CO that is formed as a product of the incomplete combustion of carbon or a carbon compound

Examples of carbon monoxide in a Sentence

Recent Examples on the Web Shoppers can nab this First Alert BRK SC7010B smoke and carbon monoxide detector at Amazon this weekend for $31.49, which is 28% off its retail price of $43.90. Melissa Lee, USA TODAY, "The 5 best Amazon deals you can get this weekend," 14 Nov. 2020 Also, install a carbon monoxide detector to alert everyone to get out of the house in the event of a buildup of the odorless toxic gas given off by fuel-burning appliances. Maggie Rauser,, "Safe Kids Carroll: Remember kitchen safety as the holiday season approaches," 7 Nov. 2020 Family members were evacuated around 12:30 a.m. on Sept. 27 from a home where the carbon monoxide detector was going off and registering very high levels of the airborne contaminant. Thomas Jewell, cleveland, "Firefighters fumed after locating origin of invisible odor in home: Moreland Hills Police Blotter," 3 Oct. 2020 Alarms that detect smoke and carbon monoxide could help to save your pet’s life in an emergency. Laura Lajiness, House Beautiful, "6 Ways to Keep Pets Safe At Home This Winter," 6 Jan. 2021 Fire Chief Butch Inks said the risk of fires and carbon monoxide is escalating and city officials fear a loss of life. Shannon Prather, Star Tribune, "St. Paul starts work to close downtown homeless encampment," 21 Dec. 2020 The report stated that three of the four children had some level of carboxyhemoglobin, or carbon monoxide bound to the blood, interfering with its ability to carry oxygen, but the amounts weren’t large enough to cause death. Sig Christenson,, "Autopsies can’t say how 4 kids died in one of San Antonio’s worst-ever murder-suicides," 2 Dec. 2020 And for the record, detectors can be purchased that warn of both fire and carbon monoxide. Rich Heileman, cleveland, "BW student masks ‘a sign of respect for others’ health’: Around The Town," 20 Nov. 2020 The men, who police did not identify, were found inside the shop in the 8100 block of Cryden Way suffering from what Prince George’s County police said may be accidental carbon monoxide poisoning. Washington Post, "One man dead, another hospitalized after suspected carbon monoxide poisoning at auto body shop," 23 Dec. 2020

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

See More

First Known Use of carbon monoxide

1868, in the meaning defined above

Keep scrolling for more

Learn More about carbon monoxide

Time Traveler for carbon monoxide

Time Traveler

The first known use of carbon monoxide was in 1868

See more words from the same year

Statistics for carbon monoxide

Last Updated

16 Feb 2021

Cite this Entry

“Carbon monoxide.” Dictionary, Merriam-Webster, Accessed 26 Feb. 2021.

Style: MLA
MLA Chicago APA Merriam-Webster

Keep scrolling for more

More Definitions for carbon monoxide

carbon monoxide


English Language Learners Definition of carbon monoxide

: a poisonous gas that is formed when carbon is not completely burned and especially when gasoline is burned in car engines

carbon monoxide

carbon mon·​ox·​ide | \ -mə-ˈnäk-ˌsīd \

Kids Definition of carbon monoxide

: a colorless odorless very poisonous gas formed by incomplete burning of carbon

carbon monoxide


Medical Definition of carbon monoxide

: a colorless odorless very toxic gas CO that burns to carbon dioxide with a blue flame and is formed as a product of the incomplete combustion of carbon

More from Merriam-Webster on carbon monoxide Encyclopedia article about carbon monoxide

Comments on carbon monoxide

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


Test Your Vocabulary

February 2021 Words of the Day Quiz

  • squirrel in winter
  • Which is a synonym of perdure?
True or False

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


Anagram puzzles meet word search.

Love words? Need even more definitions?

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