/geuh lak"tik/ , adj.
1. Astron.
a. of or pertaining to a galaxy.
b. of or pertaining to the Milky Way.
2. immense; huge; vast: a problem of galactic proportions.
3. Physiol. pertaining to or stimulating the secretion of milk.
[ 1830-40; galaktikós milky. See GALACT-, -IC ]