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

Examples of add-in 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.
And some recipes involve making add-ins that take some time. Caron Golden, San Diego Union-Tribune, 25 June 2025 Choose a few add-ins, including high-protein options, like pumpkin or chia seeds, cacao powder, fresh kale, or cinnamon. Jillian Kubala, Health, 24 June 2025 The noodle soup is highly customizable at Pho Momma, with four sizes, 12 standard protein combinations and even more add-ins. Camila Pedrosa, Sacbee.com, 30 May 2025 Just make sure to use a plain granola, ideally lightly sweetened, without any chocolate or super sweet add-ins. Jasmine Smith, Southern Living, 27 May 2025 See All Example Sentences for add-in

Word History

First Known Use

1980, in the meaning defined above

Time Traveler
The first known use of add-in was in 1980

Browse Nearby Words

Cite this Entry

“Add-in.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/add-in. Accessed 12 Jul. 2025.

Last Updated: - Updated example sentences
Love words? Need even more definitions?

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