Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A star in the constellation Canis Major, the brightest star in the sky, approximately 8.6 light-years distant from Earth. Also called Dog Star, Sothis.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • proper n. A bluish-white star in the constellation Canis Major; Alpha (α) Canis Majoris. A vertex of the Winter Triangle and the brightest star in the night sky. It is actually a binary star with a white dwarf companion star.

from the GNU version of the Collaborative International Dictionary of English

  • n. The Dog Star. See Dog Star.

from The Century Dictionary and Cyclopedia

  • n. A very white star, the brightest in the heavens, more than half a magnitude brighter than Canopus, the next brightest; the dog-star. Its magnitude is—1.4. It is situated in the mouth of the Dog.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. the brightest star in the sky; in Canis Major

Etymologies

Latin Sīrius, from Greek Seirios, from seirios, burning.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin Sīrius, from Ancient Greek Σείριος (Seirios) (Wiktionary)

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