Emitting light; shining; bright; resplendent: as, the lucid orbs of heaven.Transmitting or reflecting light; clear; transparent; pellucid: as, a lucid stream.Marked by intellectual clearness or brightness; free from obscurity or confusion of thought, or, specifically, from delirium; clear headed; sane: as, a lucid mind; lucid perceptions; lucid intervals in insanity.Presenting a clear view; easily understood; distinct: as, a lucid order or arrangement; a lucid style of writing.In entomologySmooth and very shining; reflecting light like polished metal.Giv ing light; phosphorescent; luciferous.In botany, having a shining surface