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.
Instead of relying primarily on inorganic compounds, scientists can investigate how molecular geometry and stronger electronic interactions create useful quantum properties. — Aamir Khollam, Interesting Engineering, 23 Oct. 2026 Without its own personal assistant, Anthropic might lose those daily interactions to competing products from Meta and OpenAI—even if users might prefer Anthropic’s Claude. — Wen Shao, Fortune, 23 Oct. 2026 Social interaction provides emotional support and contributes to overall well-being. — Hanna Wickes, Fort Worth Star-Telegram, 23 Oct. 2026 Other people shared their own experiences with romantic interactions and affectionate responses, showing how some individuals are choosing to use the technology. — Kurt Knutsson, FOXNews.com, 23 Oct. 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 27 Oct. 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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