undead /ʌnˈdɛd/adjective 3noun 2forms 1 adjective3 •Pertaining to a corpse, though having qualities of life. •Being animate, though non-living. •(old-fashioned) Not dead; alive. noun2 •A creature that is undead; that is, dead but still animate.Innocent VIII lent credibility to the actual existence of undeads, an action that perpetuated, and even stimulated, vampire hysteria. — 1997 •[plural only] Those who are undead.In the zombie movie, an army of the undead accosted some unsuspecting teenagers. formsundeads