Radiating or reflecting light; giving out light, whether as an original or as a secondary source; illuminating; shining; radiant; bright.Producing or adapted to produce light; having the power of yielding light.Lighted up; illuminated; bright; clear; resplendent; rendering an effect of lightness or brightness, as a work of art or a color.Figuratively, brilliant; bright or resplendent to the mind.Clear or evident to the mind, as if emitting light or as if illuminated; of such a nature as to be readily apprehended by the understanding.Characterized by perspicuity of thought: as, a luminous intellect