I'd have to say PnP that the definition is not quite right. Urban Dictionary and Wikipedia state that:
Quote:
The act of using outside or previously gained knowledge within a gaming universe for personal gain or advantage.
John was accused of metagaming when he immediately moved his player to the most protected area of the map to snipe the enemy team members, since he had played the map before and knew from experience.
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Urban Dictionary: metagaming
There is a whole post thread here
EN World - Morrus' D&D / d20 News & Reviews Site - General - Meta-Gaming: Definition that define what metagaming is. So by in large...PnP what you do is not metagaming but the abuse is.
This does not transcend to just CDTs
AT all however. It's using any external information to dictate what your character is going to do is metagaming. . .knowing that another player is leaving and doing something causes your character to do something totally out of the blue or things that just doesn't make sense is one such example.