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.
The interaction occurs several hundred feet away from the man’s previous campsite. — Ariane Lange, Sacbee.com, 8 July 2026 And greater convenience reduced the need for many small daily interactions, from running errands to attending meetings to asking simple questions in person. — Kim Meninger, Forbes.com, 8 July 2026 The investigator did not detail what occurred during that interaction or if members of Kirk’s security team were present. — Hannah Schoenbaum, Los Angeles Times, 8 July 2026 The researchers said these atomic-scale interactions are difficult to capture accurately using classical approximation methods alone. — Neetika Walter, Interesting Engineering, 8 July 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 9 Jul. 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

More from Merriam-Webster on interaction

Nglish: Translation of interaction for Spanish Speakers

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