We had a pre-meeting preparation to ensure the formal meeting would go smoothly.

pre-meeting 是由前缀 pre-（表示“在...之前”）和名词 meeting（会议）组成的复合词，字面意思是“会议之前的”。 pre-meeting preparation 指在正式会议开始前所做的准备工作，即“会前准备”。