What is the meaning of the word "leave"?

Definitions:

go away from a place verb
- At what time does your train leave?
leave unchanged or undisturbed or refrain from taking verb
- leave it as is
move out of or depart from verb
- leave the room
permission to do something noun
- I was granted leave to speak.
remove oneself from an association with or participation in verb
- They want to leave.
the period of time during which you are absent from work or duty noun
- I asked for a ten day's leave to visit my family.