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 For listening with friends, check out JBL’s GO2 waterproof ultra portable Bluetooth speaker ($29, originally $39.95; amazon.com), which offers Bluetooth streaming and up to five hours of playtime. Julianne Ross, CNN Underscored, "Shop the best Labor Day deals on Amazon," 5 Sep. 2020 Built to last through even the toughest workouts, this Rugged Strap from Nomad is fully waterproof and built with FKM, a strong yet soft fluoroelastomer. Jacob Krol, CNN Underscored, "Colorful, stylish bands to pair with your Apple Watch," 2 Oct. 2020 Both Pixel phones have less powerful processors and displays than the top devices from Samsung and Apple, and the Pixel 4a 5G is not waterproof, though the Pixel 5 is. Rishi Iyengar And Kaya Yurieff, CNN, "Google ditches the super-expensive phone race with the 5G Pixel," 30 Sep. 2020 And a waterproof rug can dress up the space, anchoring your seating and adding color and texture, says Foster. Washington Post, "How to make the most of your outdoor space as the pandemic drags on into fall and winter," 30 Sep. 2020 The splurgeworthy boots are completely waterproof, keeping your feet cozy and dry on even the rainiest of days, and are comfortable enough to wear all day long. Amanda Tarlton, USA TODAY, "10 things Meghan Markle loves to shop at the Nordstrom Anniversary Sale," 10 Aug. 2020 Shoppers should clip the $4-off coupon and then apply promo code UVL2GRUA to lower the price on this waterproof speaker. CBS News, "Best deals on day 2 of Amazon Prime Day," 16 July 2019 Available in four colors, the jacket is breathable and waterproof. Mark Heim | Mheim@al.com, al, "Labor Dale deals: North Face offering up to 30% off during end-of-summer sale," 29 Aug. 2020 Start with lighters, waterproof matches and spark rods. Popular Science, "11 essential items for four specialized survival kits," 18 Aug. 2020 Recent Examples on the Web: Noun As for the waterproof, oil-controlling foundation, 98% of customers would recommend snagging this formula thanks to its gorgeous sheen. Melissa Lee, USA TODAY, "Macy's is having a huge beauty sale right now—here's how to save," 26 Aug. 2020 Add a little ambiance to hot tub soaking sessions with this waterproof, floating Bluetooth speaker and LED light show. Dana Holmes, CNN Underscored, "Inflatable hot tubs that bring the spa to your backyard," 26 Aug. 2020 The 7-inch Kindle Oasis is a traveling reader’s best friend since the device is IPX8 waterproof-rated. Billy Cadden, Popular Science, "Travel accessories that make your trip way less stressful," 27 July 2019 Hiking boots with good ankle support are a fine option if the terrain is dry or steep, but sloppy and snowy conditions call for a waterproof or warmer higher-profile hunting boot. The Editors, Outdoor Life, "How to Hunt: A Step-by-Step Guide for New Adult Hunters," 3 June 2020 Available in aqua or black, these waterproof throw pillows would look great on a white bench or neutral patio set. Courtney Campbell, USA TODAY, "10 products under $30 to spruce up your outdoor space," 28 May 2020 My early products included waterproof sandpaper and masking tape. Dallas News, "Motley Fool: This rental company isn’t a household name but is an impressive performer," 15 Mar. 2020 And, Vasque’s proprietary waterproof membrane prevents icy water from ruining your snow day. Adrienne Donica, Popular Mechanics, "Score a Great Deal on New Boots During the Zappos Winter Event," 5 Feb. 2020 According to thousands of reviewers, Columbia's waterproof and windproof rain jackets are perfectly warm and dry, even in heavy downpours. Isabelle Kagan, USA TODAY, "You can get unbeatable deals on Columbia fleeces, hiking boots and more," 24 Apr. 2020 Recent Examples on the Web: Verb Compatible with both the Peloton bike and app, not to mention iPhones and Androids and more than 50 fitness apps, the hand-washable strap and sensor are ultra-lightweight and waterproof up to 5 feet. Courtney Thompson, CNN Underscored, "Maximize your Peloton ride with these top-selling heart rate monitors on Amazon," 13 Aug. 2020 William Drsek, the city’s public works commissioner, told the committee in a memo that the lowest bid from among three contractors for waterproofing the basement was $23,450. Ed Wittenberg, cleveland, "Solon City Council approves proposal to renovate historic Bull house," 7 Apr. 2020 The next boot care step is waterproofing your leather hunting boots so your feet stay not only warm and comfortable, but also dry when worn in inclement weather. The Editors, Field & Stream, "How to Care for Leather Boots," 3 Mar. 2020 The next boot-care step is waterproofing your best outdoor pair so your feet stay warm and dry when worn in inclement weather. Popular Science, "The best, proven way to make your leather boots last," 10 Mar. 2020 These have guards for your shins, buckles that won’t catch on anything, and waterproofing for rain or off-road riding. Alexander George, Popular Mechanics, "All the Best Motorcycle Gear You Need to Start Riding," 5 Mar. 2020 Note that many people choose not to waterproof their leather boots that have a Gore-Tex or similar lining that prevents water from reaching their feet. The Editors, Field & Stream, "How to Care for Leather Boots," 3 Mar. 2020 Or at the very least, waterproofing the lower few feet of a pier’s outer walls. John King, SFChronicle.com, "Buffing up San Francisco’s historic piers to survive sea level rise," 6 Feb. 2020 That's mostly due to the cost of the waterproof testing machine, not the parts actually used to waterproof the device. Courtney Linder, Popular Mechanics, "How to Waterproof a Watch in 10 Easy Steps," 5 Jan. 2020

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

19 Oct 2020

Cite this Entry

“Waterproof.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/waterproof. Accessed 29 Oct. 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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