1interact (with sb) (used about people) to communicate or mix with sb, especially while you work, play or spend time together (指人)相处,交往:
He is studying the way children interact with each other at different ages.他正在研究不同年纪的儿童与同辈的相互影响。
2 (of two things) to have an effect on each other (两个事物)互相作用
➔interactionnoun [U, C]: interaction (between/with sb/sth):
There is a need for greater interaction between the two departments.这两个部门需要更好地互相配合。