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

Crockett shared a clip of the interaction to point out this fact on X on Wednesday. —Jenny Goldsberry, The Washington Examiner, 10 July 2025

Designers must create interaction models that allow people to delegate tasks, supervise actions or take over when needed. —Antara Dave, Forbes.com, 10 July 2025

Unveiled during a late-night livestream, Musk claimed the new chatbot outperforms most graduate students across disciplines and now supports improved voice interactions. —Sharon Goldman, Fortune, 10 July 2025

More information from the excavation will be presented at an academic conference on Maya–Teotihuacan interaction in August, the University of Houston said. —Kerry Breen july 10, CBS News, 10 July 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