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 Fire pushed by winds and fueled by bone-dry conditions jumped fire-retardant containment lines and pushed up to 4 miles into new territory, authorities said. Gillian Flaccus, ajc, 20 July 2021 The Dees’ rebuilt house is a little smaller than the original one, and with a different floor plan — and this one was constructed with fire retardant siding. Gillian Flaccus And Adam Beam,, 15 July 2021 Three helicopters were dropping water on the fire at the top of the ridge, and air tankers were laying down a retardant line along a trail to protect two Chena Hot Springs yurts and a remote weather station, the Division of Forestry said. Anchorage Daily News, 2 July 2021 The flame retardant thread stitching is also cold-resistant, sweat absorbent, breathable and allergy-free. Chris Hachey, BGR, 25 May 2021 The Cal Fire investigators said in their report that supervisors must make sure firefighters are aware of pending water and retardant drops, that fire personnel must maintain situational awareness, and that target areas should be cleared. Matthias Gafni,, 25 Oct. 2020 Crews hit the area with helicopter water and retardant drops to cool some of the activity, the service explained. Miguel Torres, The Arizona Republic, 22 June 2021 An airtanker from Palmer also dropped retardant along a portion of the fire Monday, according to forestry officials. Tess Williams, Anchorage Daily News, 26 May 2021 The Boeing 747-400 SuperTanker, capable of dropping 19,000 gallons of fire retardant per trip, was deployed last year to battle the El Dorado Fire in Southern California -- a blaze ignited by pyrotechnics at a gender reveal party. Amanda Jackson, CNN, 28 Apr. 2021

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

31 Jul 2021

Cite this Entry

“Retardant.” Dictionary, Merriam-Webster, Accessed 2 Aug. 2021.

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English Language Learners Definition of retardant

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

More from Merriam-Webster on retardant

Thesaurus: All synonyms and antonyms for retardant

Britannica English: Translation of retardant for Arabic Speakers


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