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
Jay Kakade
july 12, New Atlas, 12 July 2025
As for fabric, waterproof canvas and breathable mesh will stand up to the elements and keep you comfortable.
—Melanie Fincher, Southern Living, 12 July 2025
Amelia McBride, Travel + Leisure, 10 July 2025
Plus, the surface itself is 100% waterproof for easy cleanup.
—Chaunie Brusie, Parents, 8 July 2025
Jordan Friedman, Smithsonian Magazine, 3 July 2025
Any future use would require the removal of the water main, repairing existing concrete, waterproofing the tunnels, and improving drainage and ventilation.
—Sydney Franklin, The Enquirer, 2 July 2025
See All Example Sentences for waterproof
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Adjective
Used in everything from firefighting foams and waterproof clothing to nonstick kitchenware, PFAS contaminants have found their way into the human body through water and food.
—Jay Kakade
july 12, New Atlas, 12 July 2025
As for fabric, waterproof canvas and breathable mesh will stand up to the elements and keep you comfortable.
—Melanie Fincher, Southern Living, 12 July 2025
Noun
Soundcore Select 4 Go Portable Speaker Bring the party with you to the pool, beach, or lake this summer thanks to this waterproof, floating Soundcore Select 4 Go portable speaker.
—Amelia McBride, Travel + Leisure, 10 July 2025
Plus, the surface itself is 100% waterproof for easy cleanup.
—Chaunie Brusie, Parents, 8 July 2025
Verb
The fire probably spread rapidly due to the paraffin wax and gasoline that covered the big top roof—a technique used by some circuses of the era to waterproof their tents, according to Berry.
—Jordan Friedman, Smithsonian Magazine, 3 July 2025
Any future use would require the removal of the water main, repairing existing concrete, waterproofing the tunnels, and improving drainage and ventilation.
—Sydney Franklin, The Enquirer, 2 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 23 Jul. 2025.
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