Dictionary.com
definitions

Canis Major

[key-nis mey-jer]
noun, genitive Ca·nis Ma·jo·ris [key-nis muh-jawr-is, -johr-] /ˈkeɪ nɪs məˈdʒɔr ɪs, -ˈdʒoʊr-/. Astronomy.
  1. the Great Dog, a southern constellation between Puppis and Orion, containing Sirius, the Dog Star, the brightest of the stars.

Origin of Canis Major

< Latin: larger dog
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for canis major

Canis Major

noun Latin genitive Canis Majoris (məˈdʒɔːrɪs)
  1. a constellation in the S hemisphere close to Orion, containing Sirius, the brightest star in the skyAlso called: the Great Dog

Word Origin for Canis Major

Latin: the greater dog
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
canis major in Science

Canis Major

[kā′nĭs]
  1. A constellation in the Southern Hemisphere near Orion. Canis Major (the Greater Dog) contains Sirius, the brightest star in the night sky.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.