Greek Mythology Cerberus, the watchdog of Hades.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "hellhound" in a sentence
"The money came from her paternal grandfather, Henry Huttleston Rogers, a Standard Oil founder called the "hellhound of Wall Street.""
"Or in this case, perhaps calling a hellhound a hellhound."
"Note 1: According to the Webster online dictionary a hellhound is a "dog of hell, named Cerberus in Greek and Roman mythology, the three-headed dog guarding the gate of Hades"."