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

Hoffman has issued several public apologies and statements regarding his interactions with Epstein. —Lily Mae Lazarus, Fortune, 18 Nov. 2025

Florida is estimated to have more than 4,000 black bears, which have drawn attention in some parts of the state because of interactions with humans in residential areas. —Steven Yablonski, CBS News, 18 Nov. 2025

One likely source of student concern is whether their school, as a commercial customer and data owner, logs interactions with identifiers and can pursue academic integrity charges and other matters on this basis. —Jeffrey C. Dixon, The Conversation, 17 Nov. 2025

Ackman’s dating advice isn’t the first interaction with a scoffing public. —Sam Gillette, PEOPLE, 17 Nov. 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