N-VAR
情況介紹會；任務下達會
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...
他們明天將召開一個新聞發布會。
Security staff did not then receive any briefing before they started each shift.
保安人員當時開始輪崗前沒有收到任何指示。