Pronunciation: (sir'ē-us), [key]
1. Astron.the Dog Star, the brightest-appearing star in the heavens, located in the constellation Canis Major.
2. Also,Seirios. Class. Myth.
a. the dog of Orion.
b. Icarius' faithful dog, who was changed into a star.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.