adj

• Relating to a galaxy.
  "Galactic astronomy is the study of the Milky Way."
• (figuratively) Enormous (in size or impact).
  "The policies and decisions to be made were neither very complex nor very numerous, since at that time, the needs and priorities in Germany did not involve issues of galactic impact, […]"
• (medicine) Of or pertaining to milk, or the secretion of milk.
  "galactic acid"

name

• (science fiction, fantasy) Denoting the name of a universal language spoken throughout a galaxy in various works.
  "The sepoy spoke again. The meaning of the words finally penetrated. Oddly, Agayan was surprised more by the fact of those words than their actual content. He had not realized that Gha could speak Galactic beyond a few crude and simple phrases."