brilliant
Cross references: 1. bright 1. bril.liant \'bril-y*nt\ aj [F brillant, prp. of briller to shine, fr. It brillare, fr. (Xbrillo beryl, fr. L beryllus 1: very bright : GLITTERING {a ~ light} 2a: STRIKING, DISTINGUISHED 2b: distinguished by unusual mental keenness or alertness - brilliant.ly av 2. brilliant n : a diamond or other gem cut in a particular form with numerous facets so as to have especial brilliancy