It means that whatever remained of your sentence is declared null and void.
I'm sorry I imposed on your private conversation.
There is no new sentence.
I will discharge the computer.
The taxation imposed by the Current Government was disliked by all.
Please do not discharge your weapon in the house.
It means that the court has come top some conclusion (perhaps a finding of guilt and imposed a sentence). However THEN the court has stayed (stopped) the portion of the adjudication that you must serve the sentence. In plain English: the conviction and the sentence go on your record, but you won't have to spend any time in jail over it.
The incoming bus will next discharge riders.
The judge showed mercy and imposed the shortest sentence he could.
Discharge can be a verb or a noun. "We did not know when they would discharge him from the hospital" uses "discharge" as a verb. "Watch for increased inflammation or any discharge" uses "discharge" as a noun.
The discharge from the power plant cooling tower is full of toxins.
The doctor will discharge the patient from the hospital once they have fully recovered.
Probably...understanding that many imposed are written so they become part of the penalty legally.