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
Synonyms
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
Christa Joanna Lee, Allure, 17 Feb. 2025
It’s also designed with a waterproof and breathable Gore-Tex two-layer construction with a rugged, recycled face fabric, and all the pockets and accouterments a resort ripper could want.
—Drew Zieff, Outside Online, 16 Feb. 2025
Stackcommerce Team (sponsored), PCMAG, 28 Jan. 2025
Plus, it’s made from durable brass that’s covered in 14-carat gold plating that’s hypoallergenic, waterproof, and tarnish-resistant, according to the brand.
—Clara McMahon, People.com, 23 Jan. 2025
Justin Davidson, Curbed, 17 Jan. 2025
These sealers are especially effective at waterproofing the grout, which is why they are recommended for high-moisture areas.
—Timothy Dale, Better Homes & Gardens, 16 Jan. 2025
See all Example Sentences for waterproof 
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Adjective
And if waterproof eye makeup has left you rubbing and regretting in the past, don’t worry—we’ve found long-wear options that deliver a comfortable, smudge-proof definition without the teary-eyed struggle.
—Christa Joanna Lee, Allure, 17 Feb. 2025
It’s also designed with a waterproof and breathable Gore-Tex two-layer construction with a rugged, recycled face fabric, and all the pockets and accouterments a resort ripper could want.
—Drew Zieff, Outside Online, 16 Feb. 2025
Noun
One drawback of physical storage is wear and tear on a physical format, but this flash drive has a durable aluminum body and a waterproof, dust-proof case.
—Stackcommerce Team (sponsored), PCMAG, 28 Jan. 2025
Plus, it’s made from durable brass that’s covered in 14-carat gold plating that’s hypoallergenic, waterproof, and tarnish-resistant, according to the brand.
—Clara McMahon, People.com, 23 Jan. 2025
Verb
They can be waterproofed with plaster, reinforced to withstand earthquakes and hurricanes, and manufactured on a vast scale with minimal environmental damage.
—Justin Davidson, Curbed, 17 Jan. 2025
These sealers are especially effective at waterproofing the grout, which is why they are recommended for high-moisture areas.
—Timothy Dale, Better Homes & Gardens, 16 Jan. 2025
See all Example Sentences for waterproof
Dictionary Entries Near waterproof
Cite this Entry
“Waterproof.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/waterproof. Accessed 22 Feb. 2025.
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