air plug


Definition of air plug

: a removable plug screwed into a watertight manhole or scuttle cover

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 air plug

1864, in the meaning defined above

Keep scrolling for more

Learn More About air plug

Time Traveler for air plug

Time Traveler

The first known use of air plug was in 1864

See more words from the same year

Dictionary Entries Near air plug

air plot

air plug

air pocket

See More Nearby Entries 

Statistics for air plug

Cite this Entry

“Air plug.” Dictionary, Merriam-Webster, Accessed 22 Oct. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon
Seen & Heard
People are talking about


Test Your Vocabulary

Farm Idioms Quiz

  • cow coming home
  • What does 'poke' refer to in the expression 'pig in a poke'?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

Love words? Need even more definitions?

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