1

waterproof

adjective wa·ter·proof \ ˈwȯ-tər-ˌprüf , ˈwä- \
Updated on: 22 Apr 2018

Definition of waterproof

: 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

Recent Examples of waterproof from the Web

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.

First Known Use of waterproof

1725

in the meaning defined above

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waterproof Synonyms


2

waterproof

noun

Definition of waterproof

1 : a waterproof fabric
2 chiefly British : raincoat

Examples of waterproof in a Sentence

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

Recent Examples of waterproof from the Web

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.

First Known Use of waterproof

1788

in the meaning defined at sense 1

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NEW! Time Traveler

3

waterproof

verb

Definition of waterproof

: to make waterproof

waterproofer

noun

Examples of waterproof in a Sentence

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

Recent Examples of waterproof from the Web

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.

First Known Use of waterproof

1820

in the meaning defined above

See Words from the same year
NEW! Time Traveler

WATERPROOF Defined for English Language Learners

waterproof

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


waterproof

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

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

Definition of waterproof for Students

: not letting water through
  • a waterproof tent

2

waterproof

verb

Definition of waterproof for Students

waterproofed; waterproofing
: to make something resistant to letting water through


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