Definition of undead
: not dead : returned from or as if from death
It may be someone I don't want to see—from the undead past, an ex-lover, my ex-best friend.— Lynne Tillman
especially, in stories about vampires and zombies
: reanimated after death by supernatural means
undead creatures We would all recognize a vampire if we saw one, that 'undead' soul who rises from the grave to gorge himself upon the blood of the living, thereby creating further generations of vampires. — Roy Porter
—often used as a collective noun Zombies apparently never brush. Witness the rotten chompers flashed by lumbering hordes of hungry undead in this dexterous thriller … — People
—used especially as the undead A brainy young philosophy graduate student … gets sucked into the nightmare world of the undead in Abel Ferrara's black-and-white indie vampire tale. — Entertainment Weekly
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Time Traveler for undead
The first known use of undead was in 1897
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