Pronunciation: (sûr'bur-us), [key]
—pl. -ber•us•es, -ber•iPronunciation: (-bu-rī") [key] for 2.
1. Also,Kerberos. Class. Myth.a dog, usually represented as having three heads, that guarded the entrance of the infernal regions.
2. a formidable and often surly keeper or guard.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.