wa·​ter·​proof | \ ˈwȯ-tər-ˌprüf How to pronounce waterproof (audio) , ˈwä-\

Definition of waterproof

 (Entry 1 of 3)

: impervious to water especially : covered or treated with a material (such as a solution of rubber) to prevent permeation by water



Definition of waterproof (Entry 2 of 3)

1 : a waterproof fabric
2 chiefly British : raincoat


waterproofed; waterproofing; waterproofs

Definition of waterproof (Entry 3 of 3)

transitive verb

: to make waterproof

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Other Words from waterproof


waterproofness noun


waterproofer noun

Synonyms for waterproof

Synonyms: Adjective

Synonyms: Noun

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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.
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Recent Examples on the Web: Adjective Her exact pick: Wunder2 Wunderbrow (22; amazon.com), a long-lasting, no-budge, waterproof gel that will up your eyebrow game with just a few strokes. Susan Brickell, Health.com, "The Exact Products Hilary Duff Uses Every Day for Longer Lashes and Fuller Brows," 17 Sep. 2019 Copies were sealed in buoyant, waterproof barrels that were marked with instructions to forward them to the nearest U.S. Consulate. John Kelly, Washington Post, "A truly magnetic personality: Capt. J.P. Ault and his amazing ship, the Carnegie," 14 Sep. 2019 For example, a mink becomes not just a pelt but also a fertilizer, a feed for other animals, an oil used to waterproof and time-guard leather, and even a biofuel. Faran Krentcil, Harper's BAZAAR, "Should Fur Be Illegal?," 13 Sep. 2019 From the Grand Canyon to the Empire State Building, from Stonehenge to the Eiffel Tower, fabric and waterproof versions of the sofa are being placed at key locations surrounding the Sept. 22 anniversary of the show's premiere. Gary Levin, USA TODAY, "Exclusive: The 'Friends' Central Perk couch is traveling to a landmark near you," 3 Sep. 2019 The Osmo Action is slightly more waterproof than the Hero7 (36 feet vs. 33 feet). Brent Rose, The Verge, "DJI Osmo Action review: giving GoPro real competition," 5 Aug. 2019 Any fool with a phone can take a beautiful picture of a sunset on a clear evening (ugh, #nofilter braggers), but snap a waterproof case on and take some nature shots to for the 'gram. Gena Kaufman, Glamour, "21 Rainy-Day Date Ideas That Aren't Another Movie," 30 Mar. 2019 Other things to avoid: mascara, waterproof eye makeup, oily skin care, and eye cream. Katheryn Erickson, Glamour, "Your Everything Guide to Eyelash Extensions," 28 Mar. 2019 Its connectivity modems and routers—solar-powered, waterproof and designed for rugged environments—deliver internet to the most remote places on the planet. Matthew Heimer, Fortune, "Fortune’s 2019 Change the World List: Companies to Watch," 19 Aug. 2019 Recent Examples on the Web: Noun The four waterproof recipe cards in this cooking kit share recipes from a specific country, and include detailed illustrations, which are extremely helpful for young chefs who cannot yet read. Jolene Thym, The Mercury News, "Taste Off: The best cooking kits for kids," 26 Aug. 2019 Anker Soundcore SoundBuds wireless earbuds - IPX7 waterproof for $21.99 at Amazon (clip $4 coupon - normally $25.99). iPhone XR (64GB, blue, unlocked) for $699.99 at Google Express (use code: PHONETECHBTS19 - normally $749.99). Ars Staff, Ars Technica, "Dealmaster: Save $60 on CalDigit’s TS3 Plus, our favorite Thunderbolt 3 dock," 1 Aug. 2019 Then façade plaster and paint are layered on enough times to make the stage waterproof for a year—though Urstadt says regardless, regular maintenance has to be done. Jennifer Billock, Smithsonian, "There’s a Massive Jester Floating on Austria’s Lake Constance," 15 July 2019 The exterior material, something Yeti calls DryHide, is waterproof, UV and puncture resistant, and easy to clean. Bradley Ford, Popular Mechanics, "The Best Soft Coolers for Any Outing," 25 June 2019 The voting machines were protected inside waterproof boxes and other polling material was kept dry under layers of plastic cover. Amrit Dhillon, The Seattle Times, "Poll workers journey to reach India’s most remote voters," 14 Apr. 2019 At L’ovue, a big, airy space just a block away, Kim hurries over to a row of waterproof mascaras and selects her favorite by the Japanese label Kiss Me. Kate Branch, Vogue, "This Fantastic Beasts 2 Star Has a Serious Knack for K-Beauty," 17 Nov. 2018 The company is evaluating a cup made by U.K. startup Frugalpac, which says the inclusion of an easy-to-separate waterproof lining means the cup can be processed by regular recycling facilities. Saabira Chaudhuri, WSJ, "A New Target in the Fight Against Plastic: Paper Cups," 30 Oct. 2018 Lifeactiv gives you 10,000-mAh battery power in a slim case that’s dropproof, waterproof, and dustproof. Graham Averill, Outside Online, "Emergency Gear that Should Live in Your Daypack," 9 July 2018 Recent Examples on the Web: Verb Irish Setter’s 8-inch loggers are packed with features like waterproofing, steel toes, and outsoles that are oil resistant, as well as heat resistant up to 475°F. Popular Mechanics Editors, Popular Mechanics, "The 10 Best Work Boots for Any Type of Job," 2 Aug. 2019 Those employees will make sure entry doors are waterproofed, move furniture from windows and respond to any other issues caused by the storm. Matthew J. Palm, orlandosentinel.com, "Dr. Phillips Center crane will ride out Hurricane Dorian with the wind," 31 Aug. 2019 But many other places also face substantial risk, and almost all of them are far less able to waterproof themselves than the Dutch. The Economist, "Climate change is a remorseless threat to the world’s coasts," 17 Aug. 2019 The wall will be waterproofed and new brick will be installed. Erika Butler, baltimoresun.com, "$29 million renovation of Joppatowne High to begin next summer after Harford school board approves plans, design," 13 Aug. 2019 Seal walls in basements with waterproofing compounds to avoid seepage. National Geographic, "Flood safety tips," 23 July 2019 The animal chutes blocked the escape as the oil and wax that had been used to waterproof the tent caught fire and turned the big top into a raging inferno. Steven Goode, courant.com, "His mother died saving his life during the Hartford Circus Fire, but Jerry LeVasseur turned a catastrophe into a lifetime of opportunity," 6 July 2019 The blaze spread quickly, fueled by a mixture of gasoline and paraffin wax that was used to waterproof the tent. USA TODAY, "Women in baseball, Lynyrd Skynyrd, circus fire: News from around our 50 states," 1 July 2019 Decades of widespread use of PFAS for everything from waterproofing clothes to firefighting foam has made the exposure global: Health issues arising from PFAS are estimated to cost Europe 50 billion euros per year. Zoë Schlanger, Quartz, "3M has long known it was contaminating the US food supply," 13 June 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'waterproof.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of waterproof


1725, in the meaning defined above


1788, in the meaning defined at sense 1


1820, in the meaning defined above

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Statistics for waterproof

Last Updated

1 Nov 2019

Time Traveler for waterproof

The first known use of waterproof was in 1725

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More Definitions for waterproof


How to pronounce waterproof (audio)

English Language Learners Definition of waterproof

 (Entry 1 of 2)

: designed to prevent water from entering or passing through
: designed so that water alone will not remove it



English Language Learners Definition of waterproof (Entry 2 of 2)

: to put a substance on (something) in order to make it waterproof


wa·​ter·​proof | \ ˌwȯ-tər-ˈprüf How to pronounce waterproof (audio) , ˌwä-\

Kids Definition of waterproof

 (Entry 1 of 2)

: not letting water through a waterproof tent


waterproofed; waterproofing

Kids Definition of waterproof (Entry 2 of 2)

: to make something resistant to letting water through

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Comments on waterproof

What made you want to look up waterproof? Please tell us where you read or heard it (including the quote, if possible).


a calculated move

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