af·​ter·​bay | \ ˈaf-tər-ˌbā \
plural -s

Definition of afterbay

: tailrace also : a reservoir into which it empties

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 afterbay

circa 1935, in the meaning defined above

History and Etymology for afterbay

after- + bay entry 3

Keep scrolling for more

Learn More about afterbay

Time Traveler for afterbay

Time Traveler

The first known use of afterbay was circa 1935

See more words from the same year

Statistics for afterbay

Cite this Entry

“Afterbay.” Dictionary, Merriam-Webster, Accessed 21 Sep. 2020.

Comments on afterbay

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


Test Your Vocabulary

Homophone Quiz

  • three bears two of them look like theyre whispering to a third bear who looks chuffed to be the center of attention
  • In order to judge how people felt, the senator's office hired a firm to take a ______.
Spell It

Can you spell these 10 commonly misspelled words?


Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

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