mindmap root((明亮)) bright implies emitting or reflecting a high degree of light: one of the ~est stars in the sky. brilliant implies intense and often sparkling brightness: ~ diamonds. radiant stresses the emission or seeming emission of rays of light: an imposing figure in ~ armor. luminous implies emission of steady, suffused, glowing light by reflection or in surrounding darkness: ~ white houses dot the shore. lustrous stresses an even, rich light from a surface that reflects brightly without sparkling or glittering: the ~ sheen of fine satin.