Meaning

noun a splendid assemblage (especially of famous people)

noun tufted evergreen perennial herb having spikes of tiny white flowers and glossy green round to heart-shaped leaves that become coppery to maroon or purplish in fall

noun (astronomy) a collection of star systems; any of the billions of systems each having many stars and nebulae and dust

originFrom Middle English galaxye, galaxie, from Old French galaxie, from Latin galaxias, from Ancient Greek γαλαξίας (galaxías, “Milky Way”), shortening of γαλαξίας κύκλος (galaxías kúklos, “milky circle”), from γάλα (gála, “milk”).

Etymology from Wiktionary, CC BY-SA 3.0