fill sb/sth ↔ in phr v 1 to write information in special spaces on a printed piece of paper 填写〔表格〕: He asked me to fill in a tax form. 他要我填写纳税登记表。 2 to put something in a hole or crack to make the surface smooth 填平〔空洞或缝隙〕 3 to tell someone about things that have happened recently 向…提供最新消息: I'll fill you in on all the news later. 稍后我会告诉你所有的新消息。