interaction

noun

in·​ter·​ac·​tion ˌin-tər-ˈak-shən 

: mutual or reciprocal action or influence

interactional

ˌin-tər-ˈak-sh(ə-)nəl 

adjective

Synonyms of interaction

• relation
• intercourse
• dealings

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

To prevent interactions with outsiders, the government's environmental impact report proposed using barbed wire to fence off areas Shompen communities are known to inhabit. —Omkar Khandekar, NPR, 7 June 2026

Short trips, classes and interactions with others will be rewarding. —Georgia Nicols, Denver Post, 7 June 2026

And the constant interactions between Ted and the human actors that surround him created an exciting challenge for the entire team. —Christian Zilko, IndieWire, 7 June 2026

Shortly after this interaction, Lorenzo came out to tell the Islanders that George would be leaving the villa. —Armando Tinoco, Deadline, 7 June 2026

Word History

First Known Use

1832, in the meaning defined above

Rhymes for interaction

• benefaction
• counteraction
• liquefaction
• putrefaction
• rarefaction
• satisfaction
• stupefaction
• tumefaction
• abstraction
• attraction
• compaction
• contraction

Kids Definition

interaction

noun

in·​ter·​ac·​tion ˌint-ə-ˈrak-shən 

: the action or influence of people, groups, or things on one another

interactional

-shnəl 

-shən-ᵊl

adjective

Medical Definition

interaction

noun

in·​ter·​ac·​tion ˌint-ə-ˈrak-shən 

: mutual or reciprocal action or influence

interaction of the heart and lungs

interactional

-shnəl, -shən-ᵊl 

adjective