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

Asked about the interaction after the game, a 62-48 loss which ended UConn’s unbeaten season, a 54-game win streak and hopes of back-to-back championships, Auriemma had little to say. —Lori Riley, Hartford Courant, 4 Apr. 2026

Neighbor Phyllis Wills' daughter Nevaeh, who is now 16 years old, alleged that Lorincz used slurs in her interactions with children in the neighborhood. —ABC News, 3 Apr. 2026

Woods appears composed, from the moment he is confronted by sheriff’s deputies and throughout the entire interaction. —Alaa Elassar, CNN Money, 3 Apr. 2026

The research demonstrates that the interaction between core rotation and cross-field drifts produces a larger effect than either component does on its own. —Aman Tripathi, Interesting Engineering, 3 Apr. 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