1

waterproof

play
adjective wa·ter·proof \ˈwȯ-tər-ˌprüf, ˈwä-\

Definition of waterproof

  1. :  impervious to water; especially :  covered or treated with a material (such as a solution of rubber) to prevent permeation by water

waterproofness

noun

Examples of waterproof in a sentence

  1. This suntan lotion is waterproof.

  2. luckily, my backpack is waterproof, so my clothes didn't get wet

1725

First Known Use of waterproof

1725


2

waterproof

noun wa·ter·proof

Definition of waterproof

  1. 1 :  a waterproof fabric

  2. 2 chiefly British :  raincoat

Examples of waterproof in a sentence

  1. remember your waterproof if you're walking around London in the winter

1788

First Known Use of waterproof

1788


3

waterproof

verb wa·ter·proof

Definition of waterproof

  1. transitive verb
  2. :  to make waterproof

waterproofer

noun

Examples of waterproof in a sentence

  1. He waterproofed the deck by applying sealer to it.

1820

First Known Use of waterproof

1820


WATERPROOF Defined for English Language Learners

1

waterproof

play
adjective wa·ter·proof \ˈwȯ-tər-ˌprüf, ˈwä-\

Definition of waterproof for English Language Learners

  • : designed to prevent water from entering or passing through

  • : designed so that water alone will not remove it


3

waterproof

verb wa·ter·proof

Definition of waterproof for English Language Learners

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


WATERPROOF Defined for Kids

1

waterproof

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

Definition of waterproof for Students

  1. :  not letting water through a waterproof tent


2

waterproof

play
verb wa·ter·proof

Definition of waterproof for Students

waterproofed

;

waterproofing

  1. :  to make something resistant to letting water through



Seen and Heard

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

Love words? Need even more definitions?

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

WORD OF THE DAY

a person who is a bore or nuisance

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

  • peter-bruegel-tower-of-babel-painting
  • What language does pajama come from?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Word Winder's CrossWinder

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!