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.
But the conversation, the interaction, that comes through Claude. — Kevin Stankiewicz, CNBC, 27 Aug. 2026 Like all dietary supplements, CoQ10 may cause side effects, drug interactions, and risks for certain populations. — Megan Nunn, Verywell Health, 26 Aug. 2026 Difficult interactions with the government intensify the sickness of sickness and the trauma of trauma. — Literary Hub, 26 Aug. 2026 By shifting the focus to high-stakes, spontaneous human interaction and leveraging AI for active learning rather than trusting it to do the work, educators can ensure that the knowledge lives within the student, not just the model. — Jason Corso, Time, 26 Aug. 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 1 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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