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
Jackie Cucco, Travel + Leisure, 16 Aug. 2025
Pack warm layers, waterproof gear, sturdy boots, and enough supplies to be self-sufficient, as cell coverage and fuel stations are rare in this remote wilderness.
—David Nikel, Forbes.com, 16 Aug. 2025
Migration User, Oc Register, 24 July 2025
Oilcloth tablecloths are similarly spill-proof and made of a heavy cotton base with a top coating to make the tablecloth waterproof and simple to wipe clean.
—Bestreviews, Mercury News, 10 June 2025
Andres Viglucci, Miami Herald, 25 July 2025
Meanwhile, houses and offices need to be waterproofed along with our infrastructure.
—Mark Gongloff, Mercury News, 23 July 2025
See All Example Sentences for waterproof
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Adjective
The fabric is also waterproof and has RFID protection.
—Jackie Cucco, Travel + Leisure, 16 Aug. 2025
Pack warm layers, waterproof gear, sturdy boots, and enough supplies to be self-sufficient, as cell coverage and fuel stations are rare in this remote wilderness.
—David Nikel, Forbes.com, 16 Aug. 2025
Noun
This packable beach bag is machine-washable, waterproof and sandproof.
—Migration User, Oc Register, 24 July 2025
Oilcloth tablecloths are similarly spill-proof and made of a heavy cotton base with a top coating to make the tablecloth waterproof and simple to wipe clean.
—Bestreviews, Mercury News, 10 June 2025
Verb
The contractor hired by the city will also waterproof the badly leaking house next door.
—Andres Viglucci, Miami Herald, 25 July 2025
Meanwhile, houses and offices need to be waterproofed along with our infrastructure.
—Mark Gongloff, Mercury News, 23 July 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 21 Aug. 2025.
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