Definitions:

1. Refers to anything related to a galaxy. ADJECTIVE
   • Astronomers are studying the galactic center to understand the massive black hole at the heart of the Milky Way.
2. Term associated with astronomical objects, events, or phenomena that occur in or originate from a galaxy. ADJECTIVE
   • Galactic colisions, violent encounters between galaxies, produce spectacular fireworks in the cosmos.

Synonyms:

• astronomic
• cosmic
• cosmological
• galaxy