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

• 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

The most visible are those in customer service and support, with AI agents now handling millions of customer interactions once handled by live agents over chat, email and even phone. —Hugh Cameron, MSNBC Newsweek, 17 Sep. 2025

Guests are advised to sit at the counter to not only experience the dishes created before them, but also as a way to encourage social interactions between diners. —Rachel Dube, Forbes.com, 16 Sep. 2025

The coming flyby allows the chance for spacecraft to get up close and observe how interactions with Earth's gravitational field and magnetosphere influences and changes Apophis, boosting our understanding of asteroid physics. —Andrew Jones, Space.com, 16 Sep. 2025

Altman acknowledged the tension this creates, given the intimate nature of AI interactions. —ArsTechnica, 16 Sep. 2025

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