add-in

adjective
\ ˈad-ˌin How to pronounce add-in (audio) \

Definition of add-in

: being or able to be added to and enclosed within an existing system (such as a computer) add-in hardware

Other Words from add-in

add-in noun

First Known Use of add-in

1980, in the meaning defined above

Keep scrolling for more

Learn More about add-in

Time Traveler for add-in

Time Traveler

The first known use of add-in was in 1980

See more words from the same year

Statistics for add-in

Cite this Entry

“Add-in.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/add-in. Accessed 11 Jul. 2020.

More from Merriam-Webster on add-in

Rhyming Dictionary: Words that rhyme with add-in

Comments on add-in

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

WORD OF THE DAY

See Definitions and Examples »

Get Word of the Day daily email!

Test Your Vocabulary

Words for Summer: A Quiz

  • a closeup of a sunflower
  • Which of the following words means “of or relating to summer”?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Add Diction

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!