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 effect. An interaction between medications occurs when the effectiveness of one medication is altered by another.
interaction (countable and uncountable, plural interactions) Be aware of interactions between different medications. Such technologies will also “shape future human interaction with the machines we created,” he added.
(of two or more people, things etc) to act, or have some effect, on each other.