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

The interaction between the two storms is the main reason threats of flooding rain and damaging winds have decreased for the US compared to over the weekend. —Briana Waxman, CNN Money, 30 Sep. 2025

Thibault was fined for his inappropriate interaction with an official on the court. —Chantz Martin, FOXNews.com, 30 Sep. 2025

Did you get pulled aside for any special interactions? —Jackson McHenry, Vulture, 30 Sep. 2025

An employee that stayed close to Ramos and Pegasus during his recent Holtz visit, for example, closely monitored the interactions, making sure the kids cleaned their hands properly and, at times, changed gowns following their interactions with the horse. —Miami Herald, 30 Sep. 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