retardant

adjective

re·​tar·​dant ri-ˈtär-dᵊnt How to pronounce retardant (audio)
: serving or tending to retard
a growth-retardant substance
retardant noun

Examples of retardant 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.
Crews also continued to prep Forest Road 213 to the end of the Kaibab Plateau in the north, where, beyond that point, aircraft continued to drop retardant. Michelle Cruz, AZCentral.com, 31 July 2025 The mattress tag may not, however, show what fire retardant chemicals are being used in the mattress instead. Julia Forbes, Wired News, 22 July 2025 That’s because the tankers will have to fly to a Riverside County air base to get more retardant. Karen Kucher, San Diego Union-Tribune, 22 July 2025 Small aircraft from Colorado's Division of Fire Prevention and Control dropped retardant from the sky Friday while ground crews tried to contain the burn. arkansasonline.com, 12 July 2025 See All Example Sentences for retardant

Word History

First Known Use

1642, in the meaning defined above

Time Traveler
The first known use of retardant was in 1642

Browse Nearby Words

Cite this Entry

“Retardant.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/retardant. Accessed 20 Aug. 2025.

Kids Definition

retardant

adjective
re·​tar·​dant ri-ˈtärd-ᵊnt How to pronounce retardant (audio)
: serving or tending to retard
flame-retardant fabrics

More from Merriam-Webster on retardant

Last Updated: - Updated example sentences
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