Definitions: (1) presenting a clear, distinct view; easily understood, intelligible or transparent; ; transpicuous <easily understood> (2) mentally sound; sane; rational; (3) bright; resplendent

Derivation: Latin, “shining, light”

• The only thing that can defeat absurdity is lucidity. — Albert Camus (1913-1960) French philosopher
• If water derives lucidity from stillness, how much more the faculties of the mind! The mind of the sage, being in repose, becomes the mirror of the universe, the speculum of all creation. — Zhuangzi [Zhuang Zhou] (369-286 BC) Chinese philosopher