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

• commerce
• dealings
• intercourse
• relation

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

In a world where digital interactions often overshadow genuine connections, the profound bond of friendship becomes, more than ever, an indispensable anchor. ... —Hedy Phillips, People.com, 11 May 2025

Not for nothing, either, but Simone’s interaction with the mystery man who may become a series regular (Grown-ish alum Trevor Jackson) was off-the-charts hot. —Charlie Mason, TVLine, 10 May 2025

People were cracking up at how this interaction immediately reminded them of two young siblings fighting. —Liz O'Connell, MSNBC Newsweek, 10 May 2025

Instant Messaging Tools Instant messaging tools remain a go-to for efficient team interaction, real-time collaboration and streamlining workflows. —Expert Panel®, Forbes.com, 9 May 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