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

Every renter interaction was siloed to an individual property. —Diana Olick, CNBC, 15 Aug. 2025

This frees agents to focus on high-value human interactions and complex tasks. —Joel Frenette, Forbes.com, 15 Aug. 2025

An environment of reassuring routines, predictable interactions and secure relationships helps children feel safe and ready to learn. —The Editorial Board, Chicago Tribune, 15 Aug. 2025

Armed with hindsight, every interaction with future co-workers Uhura, Chapel, and Scott is imbued with unearned significance, open to unnecessary analysis. —Richard Edwards, Space.com, 14 Aug. 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