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 of interaction

• 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 Moon moves through your 7th House of Partnership, making interactions more direct and emotionally charged in subtle ways. —Tarot.com, Sun Sentinel, 4 May 2026

Burger King is piloting an AI chatbot embedded in employee headsets that will evaluate their interactions for friendliness. —Ellen Cushing, The Atlantic, 3 May 2026

Their top complaint was interaction points with vehicles. —Jonathan Timm, New York Daily News, 3 May 2026

Spirit Airlines was known for some spirited interactions involving passengers over the years, but some longtime customers are painting a different portrait of the ultra-low cost carrier following its shuttering over the weekend. —Eve Chen, USA Today, 3 May 2026

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