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
Synonyms of waterproof
Relevance
Adjective
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
Melony Forcier, Travel + Leisure, 23 Nov. 2025
This waterproof trimmer is ergonomic, rechargeable, and built with SkinSafe blades that help reduce nicks.
—Jeaneen Russell, PEOPLE, 22 Nov. 2025
PC Magazine, 22 Nov. 2025
Helly Hansen employs some of its proprietary waterproof and breathable materials, including PrimaLoft Black Eco insulation, a PFC-free DWR treatment, and various ventilation options.
—Nathan Allen, Travel + Leisure, 14 Nov. 2025
Nathan Allen, Travel + Leisure, 14 Nov. 2025
Elsewhere, Kaufman heads into the water sans waterproofing, gray corduroy suit and gingham shirt soaked.
—Hannah Jackson, Vogue, 30 Oct. 2025
See All Example Sentences for waterproof
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Adjective
The top part of the shoe is covered with a durable, waterproof suede material, while the bottom features a light-yet-sturdy rubber outsole that prevents slipping on wet surfaces.
—Melony Forcier, Travel + Leisure, 23 Nov. 2025
This waterproof trimmer is ergonomic, rechargeable, and built with SkinSafe blades that help reduce nicks.
—Jeaneen Russell, PEOPLE, 22 Nov. 2025
Noun
The Charge 6 is IP68 waterproof, has a 24-hour battery life, and USB-C lossless for audiophiles.
—PC Magazine, 22 Nov. 2025
Helly Hansen employs some of its proprietary waterproof and breathable materials, including PrimaLoft Black Eco insulation, a PFC-free DWR treatment, and various ventilation options.
—Nathan Allen, Travel + Leisure, 14 Nov. 2025
Verb
Companies measure waterproofing in millimeters (mm).
—Nathan Allen, Travel + Leisure, 14 Nov. 2025
Elsewhere, Kaufman heads into the water sans waterproofing, gray corduroy suit and gingham shirt soaked.
—Hannah Jackson, Vogue, 30 Oct. 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 1 Dec. 2025.
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