- The Milky Way; that luminous tract, or belt, which is seen
at night stretching across the heavens, and which is composed of
innumerable stars, so distant and blended as to be distinguishable only
with the telescope. The term has recently been used for remote clusters
of stars. - A splendid assemblage of persons or things.
Meaning of 'galaxy' (Princeton's WordNet)
1 . galaxy
[ n]
Meaning (1): - (astronomy) a collection of star systems; any of the billions of systems each having many stars and nebulae and dust
Example in sentence:
`extragalactic nebula' is a former name for `galaxy'