In popular folklore, an undead being in human form that survives by sucking the blood of living people, especially at night, A kind of spectral being or ghost still possessing a human body, which, according to a superstition existing among the Slavic and other races on the lower Danube, leaves the grave during the night, and maintains a semblance of life by sucking the warm blood of living men and women while they are asleep, (folklore) a corpse that rises at night to drink the blood of the living