To liberate or free; to terminate or extinguish. A discharge is the act or instrument by which a contract or agreement is ended. A mortgage is discharged if it has been carried out to the full extent originally contemplated or terminated prior to total execution.
Discharge also means to release, as from legal confinement in prison or the military service, or from some legal obligation such as jury duty, or the payment of debts by a person who is bankrupt. The document that indicates that an individual has been legally released from the military service is called a discharge.
The performance of a duty discharges it. An attorney may speak of discharging a legal obligation.