n.

1. 离开；出发，起程[C][U][（+for）]
   The plane's departure was on schedule.

   飞机准时起飞。

2. 背离，违背，变更[C][（+from）]
   The new policy represents a complete departure from their previous position.

   新政策意味着他们完全背离了以前的立场。

3. 偏移，偏差

n.

1. the action of departing.
   ▸a deviation from an accepted, prescribed, or usual course of action.
2. Nautical  the amount of a ship's change of longitude.