[lu.mi.nous] adj [ME, fr. L luminosus, fr. lumin-, lumen] (15c) 1 a: emitting or reflecting usu. steady, suffused, or glowing light b: of or relating to light or to luminous flux
2: bathed in or exposed to steady light "~ with sunlight"
3: clear, enlightening syn see bright -- lu.mi.nous.ly adv -- lu.mi.nous.ness n