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. 管理部门与工人之间的沟通不够。

Language games are usually intended to encourage student interaction. 语言游戏通常用来鼓励学生间的交流。

The play follows the interactions of three very different characters. 该剧以3个性格迥异的人物之间的交往为主线展开情节。