airproof

adjective
air·​proof | \ ˈer-¦prüf\

Definition of airproof

 (Entry 1 of 2)

2 : made impervious to air
air·​proof | \ ˈer-¦prüf\

Definition of airproof (Entry 2 of 2)

1 : to make airtight
2 : to protect from the injurious action of air

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

First Known Use of airproof

Adjective

1758, in the meaning defined at sense 1

Transitive verb

1857, in the meaning defined at sense 1

History and Etymology for airproof

Adjective

air entry 3 + proof

Keep scrolling for more

Learn More about airproof

Time Traveler for airproof

Time Traveler

The first known use of airproof was in 1758

See more words from the same year

Statistics for airproof

Cite this Entry

“Airproof.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/airproof. Accessed 22 November 2019.

Comments on airproof

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

WORD OF THE DAY

not agreeing with established beliefs

Get Word of the Day daily email!

Test Your Vocabulary

Name that Food Quiz

Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Bee Cubed

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!