Definition of: brilliant

(bril′yənt) adjective
1. Sparkling or glowing with luster or light; very bright.
2. Showy; accomplished; illustrious; splendid: a brilliant mind, brilliant record.
—noun
1. A diamond of the finest cut, or one possessing a single large face surrounded by a bezel of 33 facets and, below the girdle, a pavilion of 25 facets. For illustration see DIAMOND.
2. Printing A small type, about 3 ½ point. [<MF brillant, ppr. of briller sparkle,? <L beryllus beryl]
—bril′liant·ly adverb
—bril′liant·ness noun