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
Mark Sparrow, Forbes.com, 18 June 2025
And finally, the JBL Go 3 speaker is down to $30, packing loud, clear audio into a travel-ready frame that’s both waterproof and tough.
—Shubham Yewale, PC Magazine, 17 June 2025
India Espy-Jones, Essence, 5 June 2025
Made with heavy-duty 600 denier polyester and canvas, this waterproof cover reliably kept water off of our furniture during our fall and winter testing period.
—Caley Sturgill, Southern Living, 30 May 2025
Timothy Dale, Better Homes & Gardens, 14 May 2025
Ducks, for instance, scoop up the oily secretion from the preen gland and spread it over their feathers to waterproof them.
—Gabe Allen, Discover Magazine, 20 Feb. 2025
See All Example Sentences for waterproof
Examples are automatically compiled from online sources to
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Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
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Adjective
This is a rugged and waterproof speaker designed to go almost anywhere and has a multi-function volume knob for controlling volume levels as well as the play/pause functions.
—Mark Sparrow, Forbes.com, 18 June 2025
And finally, the JBL Go 3 speaker is down to $30, packing loud, clear audio into a travel-ready frame that’s both waterproof and tough.
—Shubham Yewale, PC Magazine, 17 June 2025
Noun
With summer, and the 2025 ESSENCE Festival of Culture, coming up in the beauty queue, the fade-proof, waterproof, and transfer-resistant liners couldn’t have launched at a better time.
—India Espy-Jones, Essence, 5 June 2025
Made with heavy-duty 600 denier polyester and canvas, this waterproof cover reliably kept water off of our furniture during our fall and winter testing period.
—Caley Sturgill, Southern Living, 30 May 2025
Verb
Patch the plumbing or the home's structure to stop active leaks and waterproof the foundation and regrade the yard to prevent minor flooding.
—Timothy Dale, Better Homes & Gardens, 14 May 2025
Ducks, for instance, scoop up the oily secretion from the preen gland and spread it over their feathers to waterproof them.
—Gabe Allen, Discover Magazine, 20 Feb. 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 26 Jun. 2025.
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