waterproof

adjective
wa·​ter·​proof | \ ˈwȯ-tər-ˌprüf, 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

waterproof

noun

Definition of waterproof (Entry 2 of 3)

1 : a waterproof fabric
2 chiefly British : raincoat

waterproof

verb
waterproofed; waterproofing; waterproofs

Definition of waterproof (Entry 3 of 3)

transitive verb

: to make waterproof

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Other Words from waterproof

Adjective

waterproofness noun

Verb

waterproofer noun

Synonyms for waterproof

Synonyms: Adjective

leakproof, waterproofed

Synonyms: Noun

mac (or mack) [British], mackintosh (also macintosh) [chiefly British], oilskin, raincoat, slicker

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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

Uniqlo’s waterproof overcoat exudes the kind of monkish minimalism that, mercifully, is not light on style. Lilah Ramzi, Vogue, "His, Hers, Ours: Chic Cold-Weather Basics Beloved by All," 3 Jan. 2019 Then came different colors, waterproof options, vibrating wands, weird-looking brushes, and comically racy product names. Kellie Ell, Glamour, "Social Media Is Killing Mascara," 28 Nov. 2018 Because our technology is moisture-wicking, waterproof, super absorbent, and leak resistant, the fluids are drawn into the layers of the [underwear]. Hannah Dylan Pasternak, SELF, "I Tried Free Bleeding in Period-Proof Running Shorts," 30 Oct. 2018 Our product needs to be just as waterproof, breathable, and warm as the next company's. Brandon Perlman, Town & Country, "Slope Style: Aztech Mountain," 10 Feb. 2016 One such envelope, from LimeLoop, repurposes waterproof vinyl from billboards, reducing waste from two different industries. Jamie Lauren Keiles, Vox, "Why is it so hard to get rid of cardboard boxes?," 6 Dec. 2018 Their oiled, waterproof coating and rubber soles will keep your feet dry. Lexie Sachs, Good Housekeeping, "The 5 Best Hiking Boots for Women, Reviewed by Experts," 4 Dec. 2018 Made of cruelty-free and waterproof ink, the tattoos take only minutes to apply. Lauren Rearick, Teen Vogue, "Inked by Dani Launched Temporary Versions of Celebrity Tattoos," 29 Nov. 2018 The hardware itself is waterproof and has a little slot for attaching to keychains. Jeff Dunn, Ars Technica, "The Ars Holiday Gift Guide 2018—good tech for the power user in your life," 4 Dec. 2018

Recent Examples on the Web: Noun

Their adjustable earhooks wrap around your ear for a snug fit, while a waterproof coating protects them from sweat. Alexandria Haslam, PCWorld, "These massively popular Bluetooth sport headphones are only $17 today," 10 Oct. 2018 If smudges or raccoon eyes are your problem, on the other hand, Eyeko's new waterproof 'Yoga' formula, named for its flexible, ultra stretch fibers, provides serious heft without clumps. Jenna Rennert, Vogue, "5 New Black Mascaras You Need in Your Life This Fall," 17 Aug. 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 Brings back great memories - a young boy - being a boy - keep up the awesome work Jessica — michael ferrari (@idesign_mcs) June 27, 2018 Other folks were actually more impressed by Ace's waterproof cast. Lisa Gutierrez, kansascity, "Jessica Simpson's 4-year-old goes flying through the air in pool video. Moms freak out," 27 June 2018 Here are 9 waterproof eyeliner that not even a level 100 Cancer would not cry off. Sable Yong, Allure, "The Best Waterproof and Cry-Proof Eyeliners, Reviewed by Allure's Resident Cancer Sign," 21 June 2018 The UE Boom 2 produces 360 degree sound and is both waterproof and shockproof, so it’s made to be used on the go. Jackie Goldstein, The Verge, "The UE Boom 2 is on sale for $75 today only," 15 June 2018 The Soundcore Mini 2 is IPX7 waterproof and also offers 15 hours of playback on a single charge, a 66-foot Bluetooth range, and decent sound for a small, portable device. Courtney Campbell, USA TODAY, "These are the 5 best deals on Amazon," 8 June 2018

Recent Examples on the Web: Verb

This bar cart is perfect for outdoor entertaining, thanks to Olympic MAXIMUM® Stain + Sealant in One, which waterproofs against rain (plus sangria spills, of course) and has color and fade protection. Good Housekeeping, "This Shipping Pallet Bar Cart Is So Easy You Can DIY It In a Weekend," 15 Aug. 2018 Raising the building — needed to put an end to flooding of the lower lever — or waterproofing it as is would cost between $800,000 and $850,000, according to Schenck. Steven Goode, Courant Community, "Riley Lumber Property Purchase In Sight," 14 July 2018 The crew then retrofitted the space with plywood and waterproofed it before installing the shell of the pool. Liz Stinson, Curbed, "Artist turns old camper trailer into a mobile swimming pool," 15 June 2018 The coal vaults needed to be waterproofed, and the floor in the main part of the apartment had to be excavated to create higher ceilings in the dining and living rooms. Ruth Bloomfield, WSJ, "How to Live Luxe—and With Light—in a Basement Home," 13 June 2018 But before calling a basement waterproofing contractor, try other remedies. Kevin Brasler, Philly.com, "Solve a wet basement by fixing the problem, not managing it," 1 May 2018 Seam-Tape Failure Seam sealing is an amazing process used to waterproof the tiny stitch holes in a jacket. Joe Jackson, Outside Online, "How to Tell When to Retire That Rain Shell," 30 Apr. 2018 The building, built around 1920, has TV security and intercom systems, and in recent years its facade was steam-cleaned, repointed and waterproofed. Rosalie R. Radomsky, New York Times, "Recent Commercial Real Estate Transactions," 6 Feb. 2018 Kenny’s girlfriend, Sylvia Alba, helped waterproof all of his gear. Anthony Gulizia, BostonGlobe.com, "Runners went to their bag of tricks to beat the elements," 16 Apr. 2018

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

Adjective

1725, in the meaning defined above

Noun

1788, in the meaning defined at sense 1

Verb

1820, in the meaning defined above

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Statistics for waterproof

Last Updated

11 Jan 2019

Look-up Popularity

Time Traveler for waterproof

The first known use of waterproof was in 1725

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More Definitions for waterproof

waterproof

adjective

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

waterproof

verb

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

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

waterproof

adjective
wa·​ter·​proof | \ ˌwȯ-tər-ˈprüf, ˌwä-\

Kids Definition of waterproof

 (Entry 1 of 2)

: not letting water through a waterproof tent

waterproof

verb
waterproofed; waterproofing

Kids Definition of waterproof (Entry 2 of 2)

: to make something resistant to letting water through

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