Yes. Dark, very dim, is a state of mind, to me. It's where you've capably said, "I have achieved dominance over my desire to contact WAS" to satisfy your emotions.
In DB'ing terms it means zero contact. There have been people here that have gone truly dark- they've had no contact whatsoever with their spouse for weeks or even months. As KP warns, this is risky because if the LBS was cold and distant in the M (as often is the case as perceived by the WAS) then going dark just looks like "more of the same" to the WAS.
For LBS's with kids, going dark is usually not sustainable. So they go "dim"- they still have some contact but keep it strictly kid-related. Short, businesslike and to the point. No chatting, no getting together for meals, etc.
