Definitions

1. noun

a galaxy that is the closest major galaxy to the Milky Way, located about 2.5 million light-years away.

“The Andromeda galaxy, also known as the Andromeda Galaxy or Messier 31 and NGC 224, is the closest major galaxy to the Milky Way.”

2. proper noun

a constellation in which the Andromeda galaxy is located.

“The Andromeda constellation is named after the mythological princess Andromeda.”