catalytic converter

noun

: an automobile exhaust-system component containing a catalyst that causes conversion of harmful gases (such as carbon monoxide and uncombusted hydrocarbons) into mostly harmless products (such as water and carbon dioxide)

Examples of catalytic converter in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The catalytic converter – which reduces pollutants from combustion engines – the check engine light, and tight-fitting, vapor-reducing gas caps all came from state waivers approved by the EPA. Nicole Nixon, Sacbee.com, 23 May 2025 During the same time frame, two other catalytic converter thefts and several other burglaries were reported in the apartment’s garage, according to the search warrant. Shambhavi Rimal, Fort Worth Star-Telegram, 10 May 2025 Sharp had a history of several arrests in burglaries and thefts of catalytic converters, according to the warrant. Shambhavi Rimal, Fort Worth Star-Telegram, 10 May 2025 April 28 Vehicle tampering, grand theft: Between March 15 and 16, someone tampered with a vehicle parked in the 18000 block of McFarland Avenue and stole a catalytic converter for a total loss valued at approximately $3,000. Anne Gelhaus, Mercury News, 9 May 2025 See All Example Sentences for catalytic converter

Word History

First Known Use

1955, in the meaning defined above

Time Traveler
The first known use of catalytic converter was in 1955

Browse Nearby Words

Cite this Entry

“Catalytic converter.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/catalytic%20converter. Accessed 5 Jun. 2025.

Kids Definition

catalytic converter

noun
: a device containing a catalyst for changing automobile exhaust into mostly harmless products

More from Merriam-Webster on catalytic converter

Last Updated: - Updated example sentences
Love words? Need even more definitions?

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