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

The bill also would require bots to respond to interactions indicating suicidal ideas or self-harm by referring them to crisis services hotlines. —Nick Coltrain, Denver Post, 26 Apr. 2026

Asked at the start of the seventh round if the Patriots had spoken with Vrabel, vice president of player personnel Ryan Cowden deflected saying the team wanted to keep the specifics of those interactions in-house. —Andrew Callahan, Boston Herald, 26 Apr. 2026

Bode recounted of the interaction. —Carly Thomas, HollywoodReporter, 26 Apr. 2026

The eruptions – yours, the partner’s – suggest that there’s a lot that’s been simmering underneath your interactions. —R. Eric Thomas, Chicago Tribune, 25 Apr. 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