to release force or power 发（力）；放（电）
Lightning is caused by clouds discharging electricity.
闪电是由云层放电产生的。
when a gas or a liquid discharges or is discharged, or sb discharges it, it flows somewhere 排出；放出；流出
~ (into sth)
The river is diverted through the power station before discharging into the sea.
这条河改道经水电站后流入大海。
~ sth (into sth)
The factory was fined for discharging chemicals into the river.
这家工厂因往河里排放化学物质而被罚款。
[T, usually passive] ~ sb (from sth)to give sb official permission to leave a place or job; to make sb leave a job 准许（某人）离开；解雇
Patients were being discharged from the hospital too early.
病人都过早获准出院。
She had discharged herself against medical advice.
她不听医嘱擅自出院了。
He was discharged from the army following his injury.
他受伤后就退伍了。
She was discharged from the police force for bad conduct.
她因行为不端被清除出警察队伍