Definitions
1.noun(horror fiction) A creature that is undead; that is, dead but still animate.
2.noun(horror fiction) Those creatures which are undead; that is, dead yet still animate."In the zombie movie, an army of the undead accosted some nubile skinny-dipping teenagers."
3.adjectivePertaining to a corpse, though having qualities of life.
4.adjective(horror fiction) Being animate, though non-living.