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

This allows for a more natural, seamless interaction. —Scott Kramer, Forbes.com, 14 June 2026

Two things struck me about this interaction. —Chicago Tribune, 14 June 2026

Chinese brand Honor used the opening red carpet of the Shanghai International Film Festival to debut its Robot Phone, a device that marries AI interaction with a high-resolution camera that extends from the phone body like an antenna, moves on its own, and retracts when not in use. —Jenny S. Li, Variety, 14 June 2026

But with this illusion of ease comes a lack of interaction, which is an essential part of forming relationships, according to Eastwick. —Avni Trivedi, CNN Money, 13 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