interaction

noun

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

Synonyms of interaction

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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
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.
If meaningful customer data is created during anonymous interactions, governance must begin at the point of capture rather than after data is stored. — Bill Bruno, Forbes.com, 2 Sep. 2026 This one potential detection isn't statistically significant enough to confirm that what has actually been detected is an interaction between a WIMP and an everyday matter particle. — Robert Lea, Space.com, 2 Sep. 2026 This fluid interaction lowers oil viscosity, making thick liquids thin enough to flow through narrow pores. — Aman Tripathi, Interesting Engineering, 2 Sep. 2026 There’s something touching about her imperiousness, a regal vulnerability that shines through even in her romantic interaction with Dussie Mae (CJ Obilom), whom Levee has his predatory eye on. — Theater Critic, Los Angeles Times, 2 Sep. 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

Rhymes for interaction

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Browse Nearby Words

interactant
interaction
interactional
See all Nearby Words

Cite this Entry

“Interaction.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/interaction. Accessed 4 Sep. 2026.

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