This is the 417th most frequent Chinese word.
正式
Official; formal.
Here, "正式" is used as an adjective to describe the nature of the meeting.
今天我们要举行一个正式的会议。
Today, we are going to hold a formal meeting.
"正式" serves as an adjective, qualifying the event as an official or recognized encounter.
这场比赛是他们的正式对决。
This match is their formal competition.
In this sentence, "正式" describes the style of the clothing, highlighting its appropriateness for the occasion.