Webster's English Dictionary

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galaxy

gal.axy \'gal-*k-se-\ n [ME galaxie, galaxias, fr. LL galaxias, fr. Gk, fr. 
   galakt]-, gala milk; akin to L lac milk often cap  1a: MILKY WAY GALAXY  
   1b: one of billions of systems each including stars, nebulae, star clusters 
   , globular clusters, and interstellar matter that make up the universe 2: 
   an assemblage of brilliant or notable persons or things