from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A constellation in the Southern Hemisphere near Puppis and Lepus, containing the star Sirius.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- proper n. A winter constellation of the northern sky, said to resemble a dog following the hunter Orion. It includes the brightest star in the night sky Sirius, which is appropriately known as the Dog Star.
from the GNU version of the Collaborative International Dictionary of English
- n. a constellation to the southeast of Orion, containing Sirius or the Dog Star.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a constellation to the southeast of Orion; contains Sirius
Latin Canis Māior : canis, dog + māior, larger.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin canis maior, the "greater dog" (Wiktionary)