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

• commerce
• dealings
• intercourse
• relation

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

Whether these machines will ultimately become our helpful companions or raise concerns about the future of human-robot interactions remains to be seen. —Kurt Knutsson, Cyberguy Report, Fox News, 23 Mar. 2025

The interaction between Briony and Jamie starts off amiably, with Jamie needling Briony for her posh affectations. —Doreen St. Félix, The New Yorker, 22 Mar. 2025

But for now, fans can dissect their every interaction on Peacock. —Maureen Lee Lenker, EW.com, 21 Mar. 2025

Perhaps the most telling story Hopkin shares comes from a recent interaction with guests from New York. —Melissa Noel, Essence, 21 Mar. 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