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1. Clearly expressed; easily understood: a lucid analysis of the problem.
2. Thinking or expressing oneself clearly, especially between periods of confusion; clearheaded: The feverish patient was lucid now and then.
3. Brightly lit; luminous: "A lucid yellow moon was rising when Luke wheeled his truck to the curb and got out" (Willie Morris).
4. Clear; transparent: a lucid stream.
lu·cid′i·ty, lu′cid·ness n.
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