in·​ter·​ac·​tion | \ ˌin-tər-ˈak-shən How to pronounce interaction (audio) \

Definition of interaction

: mutual or reciprocal action or influence

Other Words from interaction

interactional \ ˌin-​tər-​ˈak-​shnəl How to pronounce interaction (audio) , -​shə-​nᵊl \ adjective

Synonyms & Antonyms for interaction



  • nonintercourse
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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 And that’s why this whiskey tastes good even with over two decades of maturation—aging in the cooler climate up north means less interaction between whiskey and wood. Jonah Flicker, Robb Report, 4 Aug. 2022 That’s one reason why more research exploring the interaction between the COVID-19 vaccines and menstruation is necessary. Hannah Smothers, SELF, 1 Aug. 2022 The interaction between the two men lasts just 31 seconds and was captured by Hall’s bodyworn camera and a bystander’s video. Raheem Hosseini, San Francisco Chronicle, 22 July 2022 The no hand-shake rule seemed like a way to avoid to a potentially awkward interaction between Biden and the crown prince. Joey Garrison, USA TODAY, 15 July 2022 Daughter Lori Harvey left love in the comments section of her mom's latest Instagram post Wednesday, showing a sweet interaction between the pair looking fashionable in Paris. Tommy Mcardle,, 7 July 2022 That force is due to the magnetic interaction between the two. Wired, 5 July 2022 Observation cars, if your train has one, and cafe cars on the eastern trains seem designed to encourage interaction between passengers, with seating in pods rather than rows. Erika Mailman, Washington Post, 23 June 2022 Always perform usability testing to understand the interaction between your users and the product. Ravi Teja Bommireddipalli, Forbes, 22 June 2022 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'interaction.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of interaction

1832, in the meaning defined above

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Time Traveler for interaction

Time Traveler

The first known use of interaction was in 1832

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Statistics for interaction

Last Updated

10 Aug 2022

Cite this Entry

“Interaction.” Dictionary, Merriam-Webster, Accessed 10 Aug. 2022.

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More Definitions for interaction


in·​ter·​ac·​tion | \ ˌin-tər-ˈak-shən How to pronounce interaction (audio) \

Kids Definition of interaction

1 : the act of talking or doing things with other people Board games encourage interaction.
2 : the action or influence of things on one another interaction of the heart and lungs


in·​ter·​ac·​tion | \ ˌint-ə-ˈrak-shən How to pronounce interaction (audio) \

Medical Definition of interaction

: mutual or reciprocal action or influence interaction of the heart and lungs

Other Words from interaction

interactional \ -​shnəl, -​shən-​ᵊl How to pronounce interaction (audio) \ adjective

More from Merriam-Webster on interaction

Nglish: Translation of interaction for Spanish Speakers

Britannica English: Translation of interaction for Arabic Speakers


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