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
Scott Gilbertson, Wired News, 1 May 2025
Built to handle trails and sidewalks, the Danners are waterproof, comfortable, and surprisingly stylish.
—Malia Griggs, Glamour, 1 May 2025
Ramona Saviss, Travel + Leisure, 2 Mar. 2025
Like our Best Overall pick, this speaker is dust and waterproof and can be paired with a second speaker to produce wireless stereo sound.
—Seamus Bellamy, Travel + Leisure, 6 Mar. 2025
Gabe Allen, Discover Magazine, 20 Feb. 2025
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
See All Example Sentences for waterproof
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Adjective
Importantly, since there is a zippered side pocket here, only the main compartment of the High Coast is waterproof.
—Scott Gilbertson, Wired News, 1 May 2025
Built to handle trails and sidewalks, the Danners are waterproof, comfortable, and surprisingly stylish.
—Malia Griggs, Glamour, 1 May 2025
Noun
Its stylish design doesn’t compromise function, featuring a secure zippered compartment and lightweight, waterproof (read: spill-proof) nylon material.
—Ramona Saviss, Travel + Leisure, 2 Mar. 2025
Like our Best Overall pick, this speaker is dust and waterproof and can be paired with a second speaker to produce wireless stereo sound.
—Seamus Bellamy, Travel + Leisure, 6 Mar. 2025
Verb
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
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
See All Example Sentences for waterproof
Cite this Entry
“Waterproof.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/waterproof. Accessed 5 May. 2025.
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