Definition
to depart from a location, generally to begin a trip
出发（从某地）
We plan to get off from home at seven o'clock tomorrow morning to start our trip.
我们计划明天早上七点从家里出发，开始我们的旅程。
Passengers need to get off at the boarding gate when the plane is ready to take off.
当飞机准备起飞时，乘客需要在登机口离开。
After a few days at the beach, they finally decided to get off.
在海滩待了几天后，他们终于决定离开了。
to leave one’s workplace with authorization, typically at the end of the workday
下班
I can get off at five o'clock this afternoon because my work is done.
我今天下午五点可以下班，因为我的工作完成了。
If you complete your tasks, you can get off early on Friday.
如果你完成任务，周五可以早点下班。
The boss agreed that we could get off early before the holiday.
老板同意我们在假期前可以早点下班。