Emily Dickinson Lexicon

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. – Milton.
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.