waterproof

1 of 3

adjective

wa·​ter·​proof ˈwȯ-tər-ˌprüf How to pronounce waterproof (audio)
ˈwä-
: impervious to water
especially : covered or treated with a material (such as a solution of rubber) to prevent permeation by water
waterproofness noun

waterproof

2 of 3

noun

1
: a waterproof fabric
2
chiefly British : raincoat

waterproof

3 of 3

verb

waterproofed; waterproofing; waterproofs

transitive verb

: 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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Adjective
Urban Decay Face Bond Self-setting Waterproof Foundation, $40 Because the entire face needs to be waterproof if its going to survive a night of bar-hopping: enter this matte, buildable-coverage foundation that aims to absorb sweat and oil during wear, sans powder. 5. Noor Lobad, Footwear News, 24 May 2025 Speakers Deals In our review of the JBL Clip 4, our expert enjoyed the crisp, rich audio and fully waterproof design. & John Mihaly, PC Magazine, 24 May 2025
Noun
The waterproof, kôhl pencil is beloved for its versatility, offering a few seconds of playtime before drying down. Kiana Murden, Vogue, 12 May 2025 This compact kit includes a mix of waterproof, antibacterial, and flexible bandages to cover whatever comes your way. Rosie Marder, Travel + Leisure, 9 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

Word History

First Known Use

Adjective

1725, in the meaning defined above

Noun

1788, in the meaning defined at sense 1

Verb

1820, in the meaning defined above

Time Traveler
The first known use of waterproof was in 1725

Browse Nearby Words

Cite this Entry

“Waterproof.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/waterproof. Accessed 28 May. 2025.

Kids Definition

waterproof

1 of 3 adjective
wa·​ter·​proof -ˌprüf How to pronounce waterproof (audio)
: not letting water through
especially : covered or treated with a material to prevent penetration by water

waterproof

2 of 3 noun
chiefly British

waterproof

3 of 3 verb
: to make waterproof

More from Merriam-Webster on waterproof

Last Updated: - Updated example sentences
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