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English definition of “interaction”

interaction

noun [C or U]     /ˌɪn.təˈræk.ʃən/ US  /-t̬ɚ-/
C1 an occasion when two or more people or things communicate with or react to each other: There's not enough interaction between the management and the workers . Language games are usually intended to encourage student interaction. The play follows the interactions of three very different characters .Behaving, interacting and behaviourCommunicating and keeping in touch
(Definition of interaction noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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