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 Keep them dry with good boots and waterproof gloves. Jeff Gustafson, Outdoor Life, "7 Tips for Catching Big Cold-Weather Bass," 6 Jan. 2021 The tough, waterproof construction will hold up to years of use, even in challenging conditions. Jennifer Manfrin, chicagotribune.com, "With less than two weeks remaining, here are the best deals on gifts that will arrive in time," 13 Dec. 2020 The outer materials, leather and textile are waterproof, making these a go-to for any occasion in any weather. Lindsey Vickers, USA TODAY, "Cyber Monday 2020: The best Ugg and boot deals right now," 30 Nov. 2020 These are waterproof, made with recycled polyester insulation and feature a special construction to ensure that even your fingertips stay warm. Kiana Murden, CNN Underscored, "The warmest gloves to keep your hands toasty this winter," 13 Nov. 2020 The Kindle Paperwhite is our top pick among e-book readers for offering a sharp display, a waterproof design, and access to Amazon's typically extensive Kindle library. Ars Staff, Ars Technica, "Amazon Prime Day 2020: All the best tech deals we can find (Updated)," 14 Oct. 2020 It’s waterproof, of course, and windproof, and breathable. Ben Romans, Field & Stream, "The Best Bass Pro Black Friday Deals: Early Holiday Bargains on Hunting, Fishing, and Camping Gear," 17 Nov. 2020 Because of the nature of work in the granite shop, and water on the ground from the machines, employees of the granite shop often wore waterproof boots. James Whitlow, baltimoresun.com, "Psychiatrist testifies that accused Advanced Granite shooter Radee Prince suffers from host of mental illnesses," 23 Oct. 2020 While on the pricier side, this case is 100% waterproof and made of over 60% recycled materials. Ellen Mcalpine, CNN Underscored, "Protect your iPhone 12 with these stylish and rugged cases," 16 Oct. 2020 Recent Examples on the Web: Noun Its shell is made from a heavy waterproof, windproof, breathable material with four-way stretch. The Popular Mechanics Editors, Popular Mechanics, "Gear of the Year: The Best Products We Tested in 2020," 29 Dec. 2020 Like the bibs, this outer layer has a 100 percent waterproof, windproof, and breathable exterior and heavy-duty zippers. Ben Romans, Outdoor Life, "The Best Bass Pro Black Friday Deals: Early Bargains on Fishing, Hunting, and Outdoor Gear," 18 Nov. 2020 The bag is designed to circulate the air and ozone evenly and the waterproof, air-tight zippers ensure no odors penetrate to the clothes inside. The Editors, Field & Stream, "The Best Cabela’s Cyber Monday Deals: Early Bargains Before the Holiday," 16 Nov. 2020 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 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

17 Jan 2021

Cite this Entry

“Waterproof.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/waterproof. Accessed 19 Jan. 2021.

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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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