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.
The large tankers, which are four-engine prop planes, are being retrofitted and will be able to drop more than three times the amount of fire retardant than the 1,200 gallons that S-2T air tankers based in Ramona can carry. Karen Kucher, San Diego Union-Tribune, 22 July 2025 Multiple aircraft dropped retardant to help slow the fire's spread, water was transported to crews helping with ariel suppression in portable tanks that held up to 20,000 gallons of each. Wren Smetana, AZCentral.com, 16 July 2025 Firefighters put flame retardant on the White Sage Fire on July 10, 2025. CBS News, 12 July 2025 In this incident, the firefighters may have used fire retardant foam to contain the blaze based on photos of the event. PC Magazine, 11 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 5 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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