af·​ter·​cool·​er | \ ˈaf-tər-ˌkü-lər \

Definition of aftercooler

1 : an apparatus for cooling the discharge air from air compressors in order to remove its condensed moisture
2 : a device for cooling the fuel mixture heated by compression in a supercharger

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 aftercooler

1895, in the meaning defined at sense 1

History and Etymology for aftercooler

after- + cooler entry 2

Keep scrolling for more

Learn More about aftercooler

Time Traveler for aftercooler

Time Traveler

The first known use of aftercooler was in 1895

See more words from the same year

Statistics for aftercooler

Cite this Entry

“Aftercooler.” Dictionary, Merriam-Webster, Accessed 25 Jan. 2021.

Comments on aftercooler

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


Test Your Vocabulary

Slippery Words Quiz—Changing with the Times

  • ducreux self portrait yawning
  • What is an earlier meaning of nice?
True or False

Test your knowledge - and maybe learn something along the way.

Universal Daily Crossword

A daily challenge for crossword fanatics.

Love words? Need even more definitions?

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