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

Those in-person interactions and sense of community ensure the designer is always informed about what her customers want. — Madeline Hirsch, InStyle, 5 Aug. 2026

The comedy of Gilligan’s Island often centered on the interactions between the scrawny, clueless Gilligan and the rotund, impatient skipper. — Encyclopedia Britannica, 5 Aug. 2026

Studies show the amount of time Americans spent interacting with friends and family in person was declining even before the COVID-19 pandemic shut down a lot of social interaction starting in 2020. — Fiona Doherty, The Conversation, 5 Aug. 2026

The workflows are versioned, reused, and improved rather than disappearing after a single interaction, and Sunny regularly coordinates with other agents. — Will Drover, Fortune, 5 Aug. 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