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.
–noun, plural lynx·es, ( especially collectively ) lynx for 1.
1. any of several wildcats of the genus Lynx (or Felis ), having long limbs, a short tail, and usually tufted ears, esp. L. lynx (Canada lynx), of Canada and the northern U.S., having grayish-brown fur marked with white.