wa·ter·proof
ˈwȯ-tər-ˌprüf 
ˈwä-
: impervious to water
especially
: covered or treated with a material (such as a solution of rubber) to prevent permeation by water
waterproofness
noun
waterproofed; waterproofing; waterproofs
: to make waterproof
waterproofer
noun
Examples of waterproof in a Sentence
Adjective
This suntan lotion is waterproof.
luckily, my backpack is waterproof, so my clothes didn't get wet
Noun
remember your waterproof if you're walking around London in the winter
Verb
He waterproofed the deck by applying sealer to it.
Recent Examples on the Web
David Wright Faladé, New Yorker, 28 Sep. 2025
And the bucket is fashioned using waterproof phenolic ply with a grippy inner surface that just happens to look good too.
—New Atlas, 28 Sep. 2025
Don Riddell, CNN Money, 25 Sep. 2025
This irrigator is 100% waterproof and the water tank is dishwasher safe for easy cleaning.
—Bestreviews, Mercury News, 15 Sep. 2025
Nia Bowers, USA Today, 30 Aug. 2025
Last May, Denmark’s Ministry of the Environment shared plans to ban all clothing, shoes and waterproofing agents containing PFAS.
—Alexandra Harrell, Sourcing Journal, 22 Aug. 2025
See All Example Sentences for waterproof
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Adjective
Wole, wearing a waterproof fanny pack for his phone and still working on his first beer, sat halfway in between.
—David Wright Faladé, New Yorker, 28 Sep. 2025
And the bucket is fashioned using waterproof phenolic ply with a grippy inner surface that just happens to look good too.
—New Atlas, 28 Sep. 2025
Noun
The American team could certainly have done without the aggravation of running to the pro shop to buy alternative waterproofs in 2010 because they were getting soaked in their official gear.
—Don Riddell, CNN Money, 25 Sep. 2025
This irrigator is 100% waterproof and the water tank is dishwasher safe for easy cleaning.
—Bestreviews, Mercury News, 15 Sep. 2025
Verb
Outdoor greenery is also galvanized and waterproofed to further ensure durability, giving decorators confidence that their installations will maintain beauty throughout the holidays.
—Nia Bowers, USA Today, 30 Aug. 2025
Last May, Denmark’s Ministry of the Environment shared plans to ban all clothing, shoes and waterproofing agents containing PFAS.
—Alexandra Harrell, Sourcing Journal, 22 Aug. 2025
See All Example Sentences for waterproof
Cite this Entry
“Waterproof.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/waterproof. Accessed 4 Oct. 2025.
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