▪ the galaxy of which the solar system is a part; the Milky Way.
▪ a large group of impressive people or things:"the four musicians have played with a galaxy of stars"Similarbrilliant gatheringdazzling assemblageillustrious grouphostmultitudearraymassbevyhordecompanyarmyflockgroup
Word Originlate Middle English (originally referring to the Milky Way): via Old French from medieval Latin galaxia, from Greek galaxias (kuklos) ‘milky (vault)’, from gala, galakt- ‘milk’.