re·​tar·​dant | \ ri-ˈtär-dᵊnt How to pronounce retardant (audio) \

Definition of retardant

: serving or tending to retard a growth-retardant substance

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Other Words from retardant

retardant noun

Examples of retardant in a Sentence

Recent Examples on the Web Planes dropped retardant on the blaze and additional fire crews were assisting. Josh Koehn,, "Crews Fire near Gilroy consumes 2,000 acres, evacuations remain in place," 6 July 2020 Their home was one of the several homes near Maddock Road and 17th Avenue splattered by pink fire retardant. Helena Wegner, The Arizona Republic, "'It was a very apocalyptic sight': Residents evacuated due to Aquila Fire return home," 25 June 2020 Fire crossed over retardant lines near upper western edge of Ventana Canyon. Arizona Republic, azcentral, "Evacuation order continues as Bighorn Fire threatens hundreds of homes near Tucson," 12 June 2020 Crews attacked the fire for the last few days by air, using water-scoopers, air retardant tankers and helicopters with water buckets as well as deploying firefighters on the ground. Tess Williams, Anchorage Daily News, "Wildfire crosses Dalton Highway near Fairbanks, causing heavy smoke and possible delays for drivers," 11 June 2020 Fire Department photos also showed a firefighter spraying fire retardant while atop an engine ladder, the black smoke filling the surrounding blue sky. Lauren Hernández,, "Fire severely damages historic Lorenzo Theatre in San Lorenzo," 5 June 2020 Airtankers were dropping fire retardant Sunday afternoon as the fire grew to 4,000 acres. Helen Wieffering, azcentral, "Sunset Fire grows to 4,000 acres, I-17 southbound reopens near Bumble Bee," 31 May 2020 Fixed-wing aircraft began making retardant drops shortly after sunrise. Anchorage Daily News, "More homes burned, firefighter injured as Northern California’s Kincade blaze grows," 28 Oct. 2019 Air tankers dropped flame retardant north of the border to prevent the fire’s spread, CalFire reported on Wednesday evening. Bay Area News Group, The Mercury News, "Map of fires at border: big one in Mexico,…," 16 Aug. 2019

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

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First Known Use of retardant

1642, in the meaning defined above

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Time Traveler for retardant

Time Traveler

The first known use of retardant was in 1642

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Statistics for retardant

Last Updated

18 Jul 2020

Cite this Entry

“Retardant.” Dictionary, Merriam-Webster, Accessed 9 Aug. 2020.

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More Definitions for retardant


How to pronounce retardant (audio)

English Language Learners Definition of retardant

technical : able to slow down the progress or development of something

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More from Merriam-Webster on retardant

Thesaurus: All synonyms and antonyms for retardant

Rhyming Dictionary: Words that rhyme with retardant

Britannica English: Translation of retardant for Arabic Speakers

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