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

Synonyms: Noun

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 Because the battery packs are not waterproof, keep these lights inside or an area where the battery is shielded from precipitation. Carly Totten, Better Homes & Gardens, 29 Sep. 2021 Designed by Halsey themselves, the limited edition purple cosmetics bag is waterproof, and foldable. Rania Aniftos, Billboard, 14 Sep. 2021 Like other Timex watches, the Weekender is waterproof, but only up to 100 feet, so no swimming or diving, but splashes, a quick dish wash, or any relatively short immersion won’t be an issue. Chris Hachey, BGR, 20 Aug. 2021 Lightweight, waterproof hiking boots are recommended for the canyon's sandy and wet trails, which can be slippery. Mary Caldwell, ajc, 6 Sep. 2021 Available in 48 colors and patterns, these Birkenstock-like sandals are made from soft EVA foam that's completely waterproof and washable. Eden Lichterman, PEOPLE.com, 10 Aug. 2021 Protective masks, rubber gloves, and waterproof boots that are only dedicated to flood cleanup protect you from bacteria when entering the floodwater. Bleach. Minnah Arshad, Detroit Free Press, 15 July 2021 At the very least, your watch should be completely waterproof, ideally up to several meters. Lizzy Briskin, chicagotribune.com, 9 Apr. 2021 These rugged waterproof boots can cope with all sorts of weather but also look stylish enough for a dinner date. Fiona Tapp, CNN Underscored, 26 Feb. 2021 Recent Examples on the Web: Noun That includes a 13-inch waterproof iPad that replaces the regular instrumentation, along with a dedicated slot for charging smartphones and a high-end stereo by Fusion. Rachel Cormack, Robb Report, 6 Oct. 2021 Always keep your camera in a waterproof, zip-top bag. Washington Post, 26 July 2021 In terms of making any eye shadow waterproof, though, swimmers have a favorite product for that, too. Olivia Muenter, Allure, 25 July 2021 This waterproof, Bluetooth-compatible pick had Amazon shoppers raving over its handy sound booster, which can be used to amplify its bass. Melissa Lee, USA TODAY, 1 Apr. 2021 The handset is rated IP68 and IP69 for sand, dust, and dirt resistance and waterproof to 5 feet for 35 minutes. Chris Smith, BGR, 1 Apr. 2021 And high-quality winter hiking boots are also pretty darn waterproof. Outdoor Life, 22 Feb. 2021 Its shell is made from a heavy waterproof, windproof, breathable material with four-way stretch. The Popular Mechanics Editors, Popular Mechanics, 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, 18 Nov. 2020 Recent Examples on the Web: Verb The sealant was being used to waterproof the roof and had to be spread across the entire membrane, not just applied to seams. Washington Post, 26 Aug. 2021 The sealant was being used to waterproof the roof and had to be spread across the entire membrane, not just applied to seams. Washington Post, 26 Aug. 2021 The sealant was being used to waterproof the roof and had to be spread across the entire membrane, not just applied to seams. Washington Post, 26 Aug. 2021 The sealant was being used to waterproof the roof and had to be spread across the entire membrane, not just applied to seams. Washington Post, 26 Aug. 2021 The sealant was being used to waterproof the roof and had to be spread across the entire membrane, not just applied to seams. Mary Carole Mccauley, baltimoresun.com, 23 Aug. 2021 The Chrono-Max is also dust- and sweat-resistant, and waterproof up to 1 meter of brief immersion. Ashley Hughes, Chron, 23 June 2021 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, 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, 7 Apr. 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.

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

Buying Guide

Our team at The Usage has selected the best travel backpacks of 2021.

Learn More About waterproof

Time Traveler for waterproof

Time Traveler

The first known use of waterproof was in 1725

See more words from the same year

Dictionary Entries Near waterproof

water privilege

waterproof

waterproofing

See More Nearby Entries 

Statistics for waterproof

Last Updated

8 Oct 2021

Cite this Entry

“Waterproof.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/waterproof. Accessed 15 Oct. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

Keep scrolling for more

More Definitions for waterproof

waterproof

adjective

English Language Learners Definition of waterproof

 (Entry 1 of 3)

: designed to prevent water from entering or passing through
: designed so that water alone will not remove it

waterproof

noun

English Language Learners Definition of waterproof (Entry 2 of 3)

waterproof

verb

English Language Learners Definition of waterproof (Entry 3 of 3)

: 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

More from Merriam-Webster on waterproof

Nglish: Translation of waterproof for Spanish Speakers

Britannica English: Translation of waterproof for Arabic Speakers

WORD OF THE DAY

Test Your Vocabulary

Dog Words Quiz

  • shiba puppy more or less demanding cuddles
  • Which of the following animals has a dog in its etymology?
Spell It

Can you spell these 10 commonly misspelled words?

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!