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 The faux rattan is waterproof and the cushion is machine washable. Isabel Garcia, House Beautiful, "This End Table Doubles as a Cat Bed," 7 Jan. 2020 Still, a crucial style to have in the rotation is a classic pair of rain boots—and right now, there’s a ton of stylish options on the market that are both waterproof and actually wearable to the office. Christian Allaire, Vogue, "13 Sleek Rain Boots for Every Season," 24 Dec. 2019 Because despite having tried dozens of tackle bags over the years, none of them were both 100 percent waterproof and tough enough to survive a fall off a cliff. Joe Cermele, Field & Stream, "Tips for Bass Fishing in Winter," 23 Dec. 2019 Through this process, the wood becomes waterproof and thus more durable. Sarah Cook Mcbride, al, "East meets West in this modern, forested farmhouse," 21 Dec. 2019 The zipper is leak-proof, while the outer shell is waterproof and durable. Jessica Migala, NBC News, "18 last-minute gift ideas for anyone left on your holiday list," 16 Dec. 2019 The mattress protector and pillow covers are waterproof for bonus protection. The Good Housekeeping Institute, Good Housekeeping, "GH Seal Spotlight: Protect-A-Bed Bed Bug Protection Kit," 1 Aug. 2019 Though Graham concedes it’s not waterproof, the mascara is designed for 24-hour wear without flaking or smudging. Braelyn Wood, Health.com, "Ashley Graham Wears Revlon Mascara to ‘Feel Like a Queen’," 9 Dec. 2019 For now, stone paper is confined to proprietary notebooks and reusable stone wrapping paper, which is a genuinely cool use for a waterproof material that resists tearing. Caroline Delbert, Popular Mechanics, "This Stone Paper Is Cool. Its Environmental Impact Is Complicated.," 26 Nov. 2019 Recent Examples on the Web: Noun If that wasn’t enough, it’s all contained in a waterproof, shatterproof, heavy-duty case. Ben Romans, Outdoor Life, "The Procrastinating Outdoorsman’s Guide to Last Minute Gifts," 16 Dec. 2019 So the Rev uses premium lithium cells in an IP57 waterproof, automotive-grade casing and employs anti-propagation technology. Andrew Daniels, Popular Mechanics, "The Boosted Rev Is an Absolute Blast," 11 July 2019 L’Oréal Paris Summer Bell Collection Glowing Lip Gloss, $9.99; walmart.com Best Eyeliner: Milani Stay Put Eyeliner Thanks to its supersaturated pigments, this kohl liner is transfer-resistant, sweat-proof and waterproof. Kami Phillips, PEOPLE.com, "PEOPLE Beauty Awards: Best Makeup Products of 2019," 20 Nov. 2019 After much begging, Essence Cosmetics Lash Princess Mascara is finally available in waterproof. Leah Prinzivalli, Allure, "Essence Cosmetics' Fan-Favorite Lash Princess Mascara Is Now Waterproof," 3 July 2019 For men seeking maximum cold protection, Eddie Bauer offers the Men’s Superior Down Stadium Coat, rated for -50 F, waterproof and longer than a parka by about 6 inches. Nara Schoenberg, chicagotribune.com, "Canada Goose alternatives: 10 ultra-warm winter coats that won’t set you back $1,000," 5 Nov. 2019 The final product was light-weight, breathable, and waterproof. Marc Bain, Quartzy, "The North Face’s new fabric is the latest attempt in an endless struggle to stay dry," 31 Oct. 2019 Those of you headed to the Patriots game should wear as much waterproof clothing as possible to stay dry. BostonGlobe.com, "Those of you headed to the Patriots game should wear as much waterproof clothing as possible to stay dry. Winds will be gusty, but sometimes the protection of the stadium seating doesn’t translate to as much wind down on the field.," 28 Oct. 2019 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 Recent Examples on the Web: Verb Expect extradurable interior parts that will stand up to the elements, as one engineer let slip to us that waterproofing sensitive components, such as the power seats, was a challenge. Joey Capparella, Car and Driver, "2021 Ford Bronco: Get the Inside Story Before the Official Reveal," 9 Jan. 2020 Additionally, the exterior walls would be waterproofed and new back-flow preventers would be installed. Savannah Mehrtens, Houston Chronicle, "FEMA awards Humble ISD $25 million to build flood gates at Kingwood High," 3 Dec. 2019 There's still some welding to do on the panel that divides the cabin from the truck bed, the car's interior needs to be waterproofed, and the tailgate doesn't work yet. Wired, "Why the ‘Queen of Shitty Robots’ Renounced Her Crown," 10 Dec. 2019 Several hundred more were injured when the big top, which had been soaked in paraffin and gasoline to waterproof it, caught fire and burned to the ground within minutes The cause of the fire remains undetermined. Dave Altimari, courant.com, "Police officers: ‘It’s a privilege’ to make new caskets for two unidentified Hartford circus fire victims," 24 Oct. 2019 The circus fire spread quickly and was fueled by a mixture of gasoline and paraffin wax that was used to waterproof the tent. Washington Post, "2 victims of 1944 circus fire exhumed in ID attempt," 7 Oct. 2019 The circus fire spread quickly and was fueled by a mixture of gasoline and paraffin wax that was used to waterproof the tent. Dave Collins, San Diego Union-Tribune, "2 victims of 1944 circus fire exhumed in ID attempt," 7 Oct. 2019 With the University Heights branch renovations all but complete, with the exception of some new furniture, the CH-UH libraries will turn to maintenance issues, including waterproofing the basement of the Coventry branch. Thomas Jewell, cleveland, "Cleveland Heights-University Heights School District looks at 2020 operating levy, possibly in March," 24 Sep. 2019 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

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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Time Traveler for waterproof

Time Traveler

The first known use of waterproof was in 1725

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Statistics for waterproof

Last Updated

11 Jan 2020

Cite this Entry

“Waterproof.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/waterproof. Accessed 22 January 2020.

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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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