Here's the wiki definition:
Does anyone else do it too?
What I don't get though, is that I can probably only control 1/4, maybe less of my dreams. It's always when I'm pinned to the bed paralysed with fear with a 'burglar' or something that I can't control the damn thing, even though I am very aware that I'm in the middle of a dream at the time.
I wonder if you can 'train' yourself to control them more accurately? Hmm.