WordNet sense 1 (of high or superior quality or performance):

superior

WordNet sense 2 (made smooth and bright by or as if by rubbing; reflecting a sheen or glow):

burnished, lustrous, shiny

WordNet sense 3 (the work of making something smooth and shiny by rubbing or waxing it):

polishing

WordNet sense 4 (abounding with sunlight):

sunny, sunshiny

WordNet sense 5 (reflecting light):

glistening, glossy, sheeny

WordNet sense 6 (emitting or reflecting light readily or in large amounts):

bright