Meaning : Emptied or exhausted of (as by drawing off e.g. water or other liquid).
Example :
A drained marsh.
A drained tank.
A drained and apathetic old man...not caring any longer about anything.
Meaning : Very tired.
Synonyms : knackered
Meaning : Drained of electric charge. Discharged.
Example :
A dead battery.
Left the lights on and came back to find the battery drained.
Synonyms : dead