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

For parents, Robb recommended watching for warning signs, including social withdrawal, declining grades or a growing preference for AI over human interaction. —Asuka Koda, CNN Money, 7 Mar. 2026

Expect plenty of audience interaction during the 90-minute show. —Travis Pinson, Dallas Morning News, 6 Mar. 2026

Know your rights message Coinciding with Ramadan, some Muslim groups have issued know-your-rights guidance for navigating immigration enforcement interactions, including for mosques. —Luis Andres Henao, Los Angeles Times, 6 Mar. 2026

According to court documents, Field's interactions with hospital staff and with his wife prompted the hospital to go into lockdown. —Wcco Staff, CBS News, 6 Mar. 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