airproof

adjective
air·proof | \ˈer-¦prüf\

Definition of airproof 

(Entry 1 of 2)

1 : airtight

2 : made impervious to air

airproof

transitive verb
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

Statistics for airproof

Look-up Popularity

Time Traveler for airproof

The first known use of airproof was in 1758

See more words from the same year

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

to teach someone the beliefs of a group

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Roman Mythology Quiz

  • the-triumph-of-venus-by-alessandro-magnasco
  • Boreal comes from the name of the ancient Greek god of which wind?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Syn City

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!