galaxy
n. countable B1 Intermediate US //ˈɡæɫəksi// UK //ɡˈælɐksˌi// gal·axy
n. a massive group of stars, gas, and dust held together by gravity. Our sun is part of a galaxy called the Milky Way.
n. a vast system of stars, stellar remnants, interstellar gas, dust, and dark matter, bound together by gravitational forces.
The Milky Way is the galaxy where we live.
Astronomers use powerful telescopes to observe a distant galaxy that formed shortly after the Big Bang.
The collision of two spiral galaxies can result in a massive elliptical structure, triggering a burst of new star formation as gas clouds compress.
Usage
When referring specifically to the Milky Way, it is typically capitalized as 'the Galaxy'.