In common parlance, the Hunger is the drive to feed, as it is with mortals and animals. For vampires, though, it is much more intense and takes the place of every other drive, urge, and pleasure.
Hunger Mechanic (V5)Edit
Hunger is measured in levels ranging from 0 to 5. A vampire with a Hunger of 0 is sated and satisfied, whereas a vampire with a Hunger of 5 is ravenous and can barely think of anything except their next drink.