Definition of "undead" in English

adjective

1. (obsolete) Not dead; alive.

2. Pertaining to a corpse, though having qualities of life.

3. (horror fiction) Being animate, though non-living.

noun

1. (horror and fantasy fiction) A creature that is undead; that is, dead but still animate.

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