Undead is something that's dead but acts as if alive. Therefore, Reavers are alive (very alive) but look as if they are dead. If I try to explain further, I'll just start babbling like River does when she gets incoherent. :lol:
Voice of narrator:
We now return you to the Brain Bug topic, but just after this Viagra commercial...
Voice of narrator:
We now return you to the Brain Bug topic, but just after this Viagra commercial...