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

Riccobono said a few basic tips can help make those interactions as smooth as possible. — Zach Wichter, USA Today, 22 June 2026

The federal investigation relates to Carvalho’s interaction with one or more contractors. — Howard Blume, Los Angeles Times, 22 June 2026

One example of a surprising fashion show led to interaction with guests presenting the spring 2024 collection in Milan, when staff members handed envelopes to attendees seated in the two grandstands facing a minimal black set. — Luisa Zargani, Footwear News, 21 June 2026

The Chicago rapper took the stage before a crowd that stretched throughout the venue, delivering a set that mixed fan favorites with freestyle moments and audience interaction. — J.m. Banks june 21, Kansas City Star, 21 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