interaction

noun

in·​ter·​ac·​tion ˌin-tər-ˈak-shən How to pronounce interaction (audio)
Synonyms of interactionnext
: mutual or reciprocal action or influence
interactional adjective

Examples of interaction in a Sentence

she guessed from the friendly interaction that they were close to the other parents in the organization
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.
For parents, Robb recommended watching for warning signs, including social withdrawal, declining grades or a growing preference for AI over human interaction. Asuka Koda, CNN Money, 7 Mar. 2026 Expect plenty of audience interaction during the 90-minute show. Travis Pinson, Dallas Morning News, 6 Mar. 2026 Know your rights message Coinciding with Ramadan, some Muslim groups have issued know-your-rights guidance for navigating immigration enforcement interactions, including for mosques. Luis Andres Henao, Los Angeles Times, 6 Mar. 2026 According to court documents, Field's interactions with hospital staff and with his wife prompted the hospital to go into lockdown. Wcco Staff, CBS News, 6 Mar. 2026 See All Example Sentences for interaction

Word History

First Known Use

1832, in the meaning defined above

Time Traveler
The first known use of interaction was in 1832

Browse Nearby Words

Cite this Entry

“Interaction.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/interaction. Accessed 8 Mar. 2026.

Kids Definition

interaction

noun
in·​ter·​ac·​tion ˌint-ə-ˈrak-shən How to pronounce interaction (audio)
: the action or influence of people, groups, or things on one another
interactional
-shnəl How to pronounce interaction (audio)
-shən-ᵊl
adjective

Medical Definition

interaction

noun
in·​ter·​ac·​tion ˌint-ə-ˈrak-shən How to pronounce interaction (audio)
: mutual or reciprocal action or influence
interaction of the heart and lungs
interactional adjective

More from Merriam-Webster on interaction

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!

More from Merriam-Webster