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.
Poor, hard-working people are coming out each morning to their cars stripped of catalytic converters or tires. Voice Of The People, New York Daily News, 26 Apr. 2026 Platinum and palladium are essential industrial metals, primarily used in automotive catalytic converters. Sharon Wu, USA Today, 23 Apr. 2026 Not replacing the spark plugs could lead to an engine misfire which could lead to a very costly catalytic converter replacement. John Paul Senior Manager Public Affairs and Traffic Safety Aaa Northeast, Hartford Courant, 17 Apr. 2026 According to the website Cararac, new school bus catalytic converters range in price from $250 to $550 each. Lauren Victory, CBS News, 15 Apr. 2026 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

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Cite this Entry

“Catalytic converter.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/catalytic%20converter. Accessed 1 May. 2026.

Kids Definition

catalytic converter

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

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