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

Even with its new waterproof rating, the new Paperwhite charges via USB 2.0 port. Valentina Palladino, Ars Technica, "Kindle Paperwhite 2018 review: A more premium e-reader at the right price," 7 Nov. 2018 For lashes that won't droop Makeup artists including Mally Roncal swear that layering a coat of regular mascara over a coat of waterproof mascara is the best way to coax stubborn lashes into holding a curl. Elizabeth Siegel, Allure, "Why Makeup Artists Swear by Using Two Mascaras to Make Your Eyes Stand Out," 10 Oct. 2018 The Everywhere Bag Despite its minimalist exterior, this carry-all from Away has a slew of handy features, like a pouch to attach it to your suitcase, a removable shoulder strap, and plenty of pockets, including a waterproof one for a wet umbrella. Jane Sung, Condé Nast Traveler, "The Best Weekender Bags," 26 Sep. 2018 Put the open bag on a waterproof floor in a room that will stay at a moderate temperature (cool in summer, warm in winter) and out of direct sun. Jean Nick, Good Housekeeping, "5 Ways to Water Plants While You're Away on Vacation," 22 Aug. 2018 The waterproof layer kept feet dry and toasty when conditions turned slushy, even if the Forge tended to overheat on warm days. Outside Online, "The Best Trail Shoes of 2018," 15 May 2018 Online, the jumpsuit's description reveals that the item is fully waterproof, has a hem that's a little longer in the back to stop it from riding up, and comes in a relaxed fit. Julyssa Lopez, Glamour, "ASOS Is Selling a Rainproof Jumpsuit Designed for People Who Use Wheelchairs," 4 July 2018 On top of the outermost layer of your roof (or the waterproof membrane, as it is known in roofing parlance), a protective mat or layer of insulation is laid down. Michelle Higgins, New York Times, "The Living Roof Takes Root," 26 June 2018 If the common element tuckpointing — and/or waterproof membrane underneath the masonry — is insufficient or deteriorated such that water is penetrating into the building cavity, the board must repair the water infiltration as a common expense. Howard Dakoff, chicagotribune.com, "What to do if water leaks into your condo unit," 7 June 2017

Recent Examples on the Web: Noun

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 The Matte Chic Lip Lacquer touts the liquid lipstick trifecta: transfer-proof, waterproof, and kiss-proof. Devon Abelman, Allure, "K-Pop Group Red Velvet and Etude House Just Launched the $10 Liquid Lipstick of Your Dreams," 4 May 2018 Making a teepee waterproof barely requires direction, but indulge me. Joanna Saltz, House Beautiful, "Here's How To Make Your Playroom Teepee An Outdoor Playhouse," 6 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

15 Nov 2018

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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