With regard to galaxies, or in a galactic context. / To a huge degree; immensely.

(medicine) Of or pertaining to milk, or the secretion of milk. / Relating to a galaxy. / (astronomy, specifically, sometimes capitalized) Relating to the Milky Way galaxy.

pertaining to the Milky Way Galaxy

galactic; relating to a galaxy

Great Galactic Ghoul

(astronomy) the time it takes for the Solar System to orbit around the center of the Milky Way Galaxy, estimated to be from 225 to 250 million years.

(astronomy) An aggregation of individual stars, dust, and gas (and possibly dark matter) that surrounds a galaxy

The process by which a large galaxy, through tidal gravitational interactions with a companion, merges with that companion, resulting in a larger, often irregular galaxy.

Alternative form of nongalactic

plural of galactic halo