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
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Owens remembers the days before catalytic converters and clean air regulations. Youssef Rafik, Hartford Courant, 12 July 2025 Police linked the two to June 20 and 21 catalytic converter thefts, police said. Dennis Sullivan, Chicago Tribune, 9 July 2025 Mahan touted the efforts to reduce sideshows and catalytic converter thefts, which saw a 50% year-over-year drop. Devan Patel, Mercury News, 17 May 2025 Investigators say the group coordinated thefts at Arrow Environmental Services and All Glass and Windows, removing 22 catalytic converters valued at approximately $94,000. Milena Malaver, Miami Herald, 20 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

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Cite this Entry

“Catalytic converter.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/catalytic%20converter. Accessed 23 Jul. 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
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