'Sirius' definitions:

Definition of 'Sirius'

From: WordNet
noun
The brightest star in the sky; in Canis Major [syn: Sirius, Dog Star, Canicula, Sothis]

Definition of 'Sirius'

From: GCIDE
  • Sirius \Sir"i*us\, n. [L., fr. Gr. ???, properly, scorching.] (Astron.) The Dog Star. See Dog Star. [1913 Webster]