If there is an exodus of people from a place, a lot of people leave that place at the same time.
例句
Lieutenant Malcolm said she saw no sign that the exodus from Haiti was abating...馬爾科姆海軍上尉說她沒有發現人們大批逃離海地有減緩的跡象。The medical system is facing collapse because of an exodus of doctors.由于醫生大批離去，醫療系統面臨崩潰。
英漢詞典釋義
n.
(包含一大批人的)遷移；出走,外流,撤離；倉促逃離
capital exodus資本逃避rural exodus農村遷離
英英詞典釋義
Noun
1. a journey by a large group to escape from a hostile environment