The meaning of INTERACTION is mutual or reciprocal action or influence. How to use interaction in a sentence.

Communicating & keeping in touch (Definition of interaction from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

Definition of interaction noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Interaction, or an interaction, of substances occurs when the substances affect each other's behavior or action. One possible drug interaction can involve the drugs working together to have a stronger …

(of two or more people, things etc) to act, or have some effect, on each other.

in•ter•ac•tion, n. [uncountable] social interaction between men and women. [countable] day-to-day interactions. in•ter•ac•tive, adj.: Interactive video lets the user decide what to see on the screen.

Jun 23, 2025 · Established in 1984, InterAction is the leading alliance of NGOs and partners in the United States. With a focus on serving the world’s impoverished and vulnerable populations, our …

Dec 14, 2025 · interaction (countable and uncountable, plural interactions) Be aware of interactions between different medications. Such technologies will also “shape future human interaction with the …

If you interact with someone — by talking, looking, sharing, or engaging in any kind of action that involves the two of you — you can be said to have had an interaction with that person.

interaction definition: communication or direct involvement with someone or something. Check meanings, examples, usage tips, pronunciation, domains, and related words.