Definition that contains canis major
- sirius the brightest star in the sky; in Canis Major
- argo formerly a large constellation in the southern hemisphere between Canis Major and the Southern Cross; now divided into Carina and Pyxis and Puppis and Vela
- canicula the brightest star in the sky; in Canis Major
- sothis the brightest star in the sky; in Canis Major
- puppis a constellation in the southern hemisphere between Vela and Canis Major that shaped like the stern of a boat
- dog star the brightest star in the sky; in Canis Major