undead

Not dead; alive.

Pertaining to a corpse, though having qualities of life.

Being animate, though non-living.

When Anna and John finally break out of their self-centered bubbles to the shock that they must battle to the death an undead neighbor in a giant snowman costume, it plays like a poignant comment on movie teenagers' tendency to indulge their inner lives, ignorant of the world around them.

A creature that is undead; that is, dead but still animate.

In the zombie movie, an army of the undead accosted some unsuspecting teenagers.

"You will do me a service," the undead said to him.