N-VAR
情况介绍会；任务下达会
A briefing is a meeting at which information or instructions are given to people, especially before they do something.
例句
They're holding a press briefing tomorrow...
他们明天将召开一个新闻发布会。
Security staff did not then receive any briefing before they started each shift.
保安人员当时开始轮岗前没有收到任何指示。