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


commerce, dealings, intercourse, relation



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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

The juxtaposition helps employees see interactions from every side. Peter Holley, Washington Post, "Walmart has added virtual reality to its assessment of an employee’s potential," 12 July 2019 When community-level ire gives way to parent-ranking shaming, how will these interactions ladder up to potential social and legal ramifications? John C. Havens, Quartz, "Will we lose our rights as parents once robots are better at raising our kids?," 10 July 2019 Researchers are hoping to learn more about white shark interaction from drone footage that captured two sharks interacting with each other off the coast of Chatham on Monday. Sophia Eppolito,, "Drone footage shows sharks fighting each other off Cape Cod," 9 July 2019 Effective June 1, SafeSport instituted new policies aimed at limiting one-on-one interactions and electronic communications between coaches or trainers and minors, helping reduce opportunities for abuse. Brent Schrotenboer, USA TODAY, "Horse trainer's suicide has equestrian community questioning sexual abuse investigations," 9 July 2019 In Wasilla, the two sides were separated by a wide sidewalk to the school but tense interactions — and sometimes meaningful exchanges — couldn’t be avoided. Alex Demarban, Anchorage Daily News, "Dueling rallies meet on doorstep of would-be special session in Wasilla," 9 July 2019 This is true for every neuron, no matter how broad the network, so local interactions collectively influence the activity of the whole. Gabriel A. Silva, The Conversation, "Neuroscience and artificial intelligence can help improve each other," 9 July 2019 The documentary implicitly asks: What might have led to the fateful interactions leading to Roy's death? Katherine J. Igoe, Marie Claire, "How Did Michelle Carter and Conrad Roy III Meet?," 8 July 2019 The interaction of high dewpoints and a cold front Saturday afternoon brought showers and thunderstorms to the state with heavy downpours. Peter Marteka,, "Saturday’s showers and thunderstorms will usher in drier, cooler air," 6 July 2019

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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Statistics for interaction

Last Updated

17 Jul 2019

Look-up Popularity

Time Traveler for interaction

The first known use of interaction was in 1832

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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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Comments on interaction

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


an act or instance of editing or removing

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