waterproof

adjective
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

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

Keep scrolling for more

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

Visit the Thesaurus for More 

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.
See More

Recent Examples on the Web: Adjective

Brugman adds warm water and Fresh's Soy Cleanser on the pad and rubs it on her face using a circular motion to help dissolve any waterproof mascara on her lashes. Nicole Saunders, Harper's BAZAAR, "Watch Devin Brugman's Entire Nightly Skincare Routine," 16 May 2019 The tent also uses a fabric that is more durable and waterproof than on many ultralight backpacking tents. James Lynch, Popular Mechanics, "This Spring’s 11 Best Camping Tents," 1 May 2019 And a matte wax-oil finish provides waterproof and stain-resistant durability, ensuring your terrazzo trendsetter becomes a timeless treasure. Jennifer Fernandez, House Beautiful, "This Company Is Making Gorgeous Terrazzo Furnishings Out Of Recycled Marble," 11 Dec. 2018 The new summer design features a feminine floral print by Rifle Paper Co. wrapped in translucent waterproof material that’s ready to go, rain or shine. Bree Coven Foster, The Seattle Times, "Retro-chic bag is gentle on the earth," 18 July 2018 The brand claims it’s waterproof and lasts 24 hours, and has an-easy glide formula and tip. Glamour, "Too Faced's New Better Than Sex Eyeliner Lives Up to the Name," 3 Apr. 2019 With a fun tie-dye print and waterproof fabric, the jumpsuit — which retails for $64 and is a collaboration between ASOS and Chloe Ball-Hopkins — promises to be the perfect blend of comfortable, stylish, and practical. De Elizabeth, Teen Vogue, "ASOS Is Selling a "Wheelchair-Friendly" Jumpsuit," 5 July 2018 For details on the RedHead Turkey Lounger, which has all of the above and is made of heavy, waterproof camo fabric, visit Bass Pro Shops at www.basspro.com. Frank Sargeant, AL.com, "Vested Interest: Turkey vests are the Swiss Army knife of hunting," 8 Apr. 2018 And yet, its Oxford tent fabric is still waterproof, strong, and breathable. James Lynch, Popular Mechanics, "The 7 Best Rooftop Tents for Far-Out (and Closer-to-Home) Adventures," 26 Apr. 2019

Recent Examples on the Web: Noun

Mistake #4: The Wrong Glue Wood glue comes in three basic varieties as far as its water resistance is concerned: standard, moisture-resistant, and waterproof. Roy Berendsohn, Popular Mechanics, "5 Biggest Woodworking Mistakes (And How to Avoid Them)," 15 Jan. 2019 The outer includes a Gore-Tex Pro material for a waterproof and windproof exterior that remain breathable. Tim Newcomb, Popular Mechanics, "Everything That Goes Into Making an Arc'teryx Jacket," 24 May 2019 The voting machines were protected inside waterproof boxes and other polling material was kept dry under layers of plastic cover. Amrit Dhillon, The Seattle Times, "Poll workers journey to reach India’s most remote voters," 14 Apr. 2019 At L’ovue, a big, airy space just a block away, Kim hurries over to a row of waterproof mascaras and selects her favorite by the Japanese label Kiss Me. Kate Branch, Vogue, "This Fantastic Beasts 2 Star Has a Serious Knack for K-Beauty," 17 Nov. 2018 Master of the Elements Gore has always rain-tested its stuff; these materials are certified waterproof, after all. Tim Newcomb, Popular Mechanics, "Inside the Futuristic Labs That Forge Gore-Tex," 28 Nov. 2016 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

Recent Examples on the Web: Verb

New seats are part of a $10 million update at Arrowhead Stadium that will include a re-application of waterproofing measures to the entire upper deck and an update to the Arrowvision scoreboard. Pete Grathoff, kansascity, "Here’s a look at the new seats in upper deck at Arrowhead Stadium," 4 June 2019 The Tech Trench's long cut will make rain run off of you, and taped seams and waterproofing keep you dry. James Lynch, Popular Mechanics, "The Best Rain Jackets for Keeping Dry," 8 Mar. 2019 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

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.

See More

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

Keep scrolling for more

Learn More about waterproof

Statistics for waterproof

Last Updated

14 Jun 2019

Look-up Popularity

Time Traveler for waterproof

The first known use of waterproof was in 1725

See more words from the same year

Keep scrolling for more

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 How to pronounce waterproof (audio) , 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

Keep scrolling for more

Comments on waterproof

What made you want to look up waterproof? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

a device or gadget

Get Word of the Day daily email!

Test Your Vocabulary

Words for Summer: A Quiz

  • a closeup of a sunflower
  • Which of the following words means “of or relating to summer”?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!