1. easily understood; completely intelligible or comprehensible: a lucid explanation.
2. characterized by clear perception or understanding; rational or sane: a lucid moment in his madness.
3. shining or bright.
4. clear; pellucid; transparent.
See more synonyms on Thesaurus.com
1. plain, understandable, evident, obvious. 2. sound, reasonable. 3. radiant, luminous. 4. limpid.
1, 4. obscure. 2. irrational. 3. dim.
Origin: 1575-85; < Latin lūcidus, equivalent to lūc-, stem of lūx light + -idus -id
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