aerator

noun

aer·​a·​tor ˈer-ˌā-tər How to pronounce aerator (audio)
: one that aerates
especially : an apparatus for aerating something (such as sewage)

Examples of aerator in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
In ponds and water features, add a fountain or aerator, or stock fish that eat larvae. Ryan Brennan april 30, Miami Herald, 30 Apr. 2026 Add a fountain or aerator to ponds, or use fish that eat mosquito larvae. Ryan Brennan april 30, Fort Worth Star-Telegram, 30 Apr. 2026 Aeration can be done with a core aerator that punches shallow holes in the surface, or with a shovel or a rototiller that turns the soil more deeply. Mary Marlowe Leverette, Southern Living, 23 Apr. 2026 Larger areas that need reseeding should be prepared with a core aerator. Alexandra Jones, The Spruce, 19 Apr. 2026 See All Example Sentences for aerator

Word History

Etymology

aerate + -or entry 1

First Known Use

1844, in the meaning defined above

Time Traveler
The first known use of aerator was in 1844

Browse Nearby Words

Cite this Entry

“Aerator.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/aerator. Accessed 1 May. 2026.

Medical Definition

aerator

noun
: one that aerates
especially : an apparatus for aerating something (as sewage)
Love words? Need even more definitions?

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

More from Merriam-Webster