'Hellhound' definitions:

Definition of 'hellhound'

From: WordNet
noun
A very evil man
noun
(Greek mythology) the three-headed dog guarding the entrance to Hades; son of Typhon [syn: Cerberus, hellhound]

Definition of 'Hellhound'

From: GCIDE
  • Hellhound \Hell"hound`\, n. [AS. hellehund.] A dog of hell; an agent of hell. [1913 Webster]
  • A hellhound, that doth hunt us all to death. --Shak. [1913 Webster]