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
Rosie Marder, Travel + Leisure, 19 Oct. 2025
In addition to being functional, these waterproof boots are stylish, too(even celebrities like Kate Winslet appreciate a fall Chelsea boot).
—Sian Babish, PEOPLE, 18 Oct. 2025
Chris Haslam, Wired News, 16 Oct. 2025
Opt for something like these waterproof (and fireproof) document bags or plastic bins designed to keep water out.
—Jillian Dara, Travel + Leisure, 14 Oct. 2025
Karthika Gupta, Travel + Leisure, 14 Oct. 2025
To waterproof the shower stall, cover the surfaces with tile, then mount the showerhead and controls on the wall opposite the opening to limit splashing.
—Halee Miller Van Ryswyk, Better Homes & Gardens, 12 Sep. 2025
See All Example Sentences for waterproof
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Adjective
This $10 one from Amazon is made of waterproof nylon with RFID blocking, so your cards stay dry and your data stays private, and the sturdy zippers feel reassuringly secure without adding bulk.
—Rosie Marder, Travel + Leisure, 19 Oct. 2025
In addition to being functional, these waterproof boots are stylish, too(even celebrities like Kate Winslet appreciate a fall Chelsea boot).
—Sian Babish, PEOPLE, 18 Oct. 2025
Noun
Most trail running brands offer a choice of waterproof (typically Gore-Tex) or breathable models.
—Chris Haslam, Wired News, 16 Oct. 2025
Opt for something like these waterproof (and fireproof) document bags or plastic bins designed to keep water out.
—Jillian Dara, Travel + Leisure, 14 Oct. 2025
Verb
Keen Targhee 4 Mid-height Waterproof Hiking Shoes These Keen hiking shoes are designed for comfort and versatility on various terrains thanks to the brand’s waterproofing system that keeps your feet dry, while the breathable mesh upper ensures ventilation during hikes.
—Karthika Gupta, Travel + Leisure, 14 Oct. 2025
To waterproof the shower stall, cover the surfaces with tile, then mount the showerhead and controls on the wall opposite the opening to limit splashing.
—Halee Miller Van Ryswyk, Better Homes & Gardens, 12 Sep. 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 25 Oct. 2025.
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