German phrase
Was genau meinen Sie mit ~?
Meaning
What exactly do you mean by ___?
When to use it
Ask for a clear meaning. Use it politely to avoid misunderstandings.
Example dialogue
Was genau meinen Sie mit dem Plan?
What exactly do you mean by the plan?
Ich meine, wir müssen den Zeitplan verschieben.
I mean, we need to change the schedule.