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

• 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

Nest entrances were also spaced farther apart, reducing interactions between ants that were entering and exiting. —NPR, 21 Oct. 2025

According to preliminary information from police, an interaction between a suspect and highway patrol trooper escalated to the trooper firing shots toward the suspect. —Kendrick Calfee, Kansas City Star, 21 Oct. 2025

Fast delivery strengthens engagement, deepens brand connection and supports our ambition to create luxury experiences that go beyond retail, making every interaction more seamless and personal. —Sofia Celeste, Footwear News, 21 Oct. 2025

With more than 90% of customer inquiries handled digitally, AI now plays a role in simplifying service interactions. —Eva Roytburg, Fortune, 21 Oct. 2025

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