# What does insubstantial mean?

We've seen a few powers that make a creature insubstantial now, but we haven't been able to find out what it means. What does it mean and where can we get a clear definition?

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On the off-chance that you were looking for a real-world rather than D&D definition, "insubstantial" means "lacking substance", i.e. without material presence, ethereal. – DJClayworth Aug 23 '11 at 3:00