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

At home, consciously shape algorithm interactions to reflect your preferences and ethical positions. —Cornelia C. Walther, Forbes.com, 9 Sep. 2025

Casual interactions at the post office or a coffee shop easily turn into conversations. —Lisa Cericola, Southern Living, 9 Sep. 2025

Curiosity and possibly even lust play into their first encounter; part of the welcome complexity between this pale-skinned woman of substance and this tall, equally alabaster, formerly dead drink of water is the ambiguity in their initial interactions. —David Fear, Rolling Stone, 9 Sep. 2025

Both California and Delaware attorneys general are investigating the restructuring, with concerns about recent suicides linked to ChatGPT interactions complicating approval. —Sheryl Estrada, Fortune, 9 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