LU'CID, a. [L. lucidus, from luceo, to shine. See Light.]
1. Shining; bright; resplendent; as the lucid orbs of heaven.2. Clear; transparent; pellucid; as a lucid stream.3. Bright with the radiance of intellect; not darkened or confused by delirium or madness; marked by the regular operations of reason; as the lucid intervals of a deranged man.4. Clear; distinct; presenting a clear view; easily understood; as a lucid order or arrangement.