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

Organoids are engineered to facilitate interactions between cells and multiple cell types, as well as between cells and their surrounding environment. — Encyclopedia Britannica, 6 Nov. 2026

No other deputies have been implicated in the drug-smuggling scheme, but the case brought scrutiny on Meiser’s unit and its interaction with inmates. — Ruben Vives, Los Angeles Times, 6 Nov. 2026

Recording every interaction creates clutter, while overlooking important details can leave future sessions without useful context. — Aamir Khollam, Interesting Engineering, 6 Nov. 2026

With fewer prolonged interactions, companies must discover new ways to create lasting customer value. — Jerry Haywood, Forbes.com, 6 Nov. 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