n.

1. 遠征；探險；考察[C]
   They did an expedition to the Himalayas.

   他們到喜馬拉雅山去考察了一次。

2. 遠征隊；探險隊；考察隊[C]
   He was on an expedition to explore the Antarctic.

   他參加探險隊遠征南極。

3. 迅速，敏捷[U]

n.

1. a journey undertaken by a group of people with a particular purpose.
2. formal promptness or speed in doing something.