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

Definition of interaction

: mutual or reciprocal action or influence

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Other Words from interaction

interactional \ ˌin-​tər-​ˈak-​shnəl How to pronounce interactional (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 Video of the interaction went viral on social media, with some praising the couple for protecting their property. Dominick Mastrangelo, Washington Examiner, "'In fear of our lives': Man who brandished AR-15 at Black Lives Matter protesters says he was 'all alone facing an angry mob'," 29 June 2020 At least one protester sat on the vehicle and a sign blocked the view for part of the interaction before the vehicle accelerated. Darcie Moran, Detroit Free Press, "Detroit police thought they were possibly being shot at, Chief Craig says; protesters call for his resignation," 29 June 2020 The Post’s database only counts police shootings, not other forms of police interaction that resulted in fatalities, so Kirk incorrectly attributed the number of all police killings in 2019 to a database that only records deaths by shooting. Molly Stellino, USA TODAY, "Fact check: Police killed more unarmed Black men in 2019 than conservative activist claimed," 24 June 2020 Police body-cam footage and eyewitness cell phone video show some of the interaction between the officers and the teens. Chris James, CNN, "For Black Tulsa residents, the city's racial past and present hover over Trump rally," 20 June 2020 The video, which is about 15 seconds long, has no audio and does not show any part of the interaction between Reed and the officer that ended in Reed's death. Justin L. Mack, The Indianapolis Star, "Dreasjon Reed: New surveillance footage captures moments before fatal police shooting," 17 June 2020 Remarkably, both patients and clinicians alike have discovered that this form of clinical interaction can work and may even be preferable in some scenarios. Isobel Rosenthal, Scientific American, "Mental Health after COVID-19," 17 June 2020 But one New Yorker’s recent experience in a bagel shop shows that not everyone is on board with the official guidelines—and a video of the interaction is going viral. Claire Gillespie,, "A Maskless Woman Coughed on a Fellow Customer—and the Video Is Going Viral," 15 June 2020 The journey may be complicated by cultural differences that inhibit the kind of easy interaction that leads to good working relationships. Fortune, "Effective strategies for finding—and retaining—talented nonwhite and female lawyers: A black partner’s perspective," 12 June 2020

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.

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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

4 Jul 2020

Cite this Entry

“Interaction.” Dictionary, Merriam-Webster, Accessed 9 Jul. 2020.

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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 interactional (audio) \ adjective

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