1. To clear something totally out or away from something. A noun or pronoun can be used between "purge" and "away." We'll need to purge away the contaminated coolant before we operate the machinery again. I recommend emptying the tank of your lawn mower after the winter to purge old fuel away.
2. To cleanse one's mind or soul of something impure. A noun or pronoun can be used between "purge" and "away." I recommend you turn to prayer to purge away those evil thoughts. Your obsessive focus on purging sin away from the souls of your congregation has become a sin unto itself.
purge something away
to wash or flush something away. We will purge the rusty water away and then start up the pump again. We will have fresh, clean water again in no time. Laura purged away the rusty water.