adjective lu·cid \ˈlü-səd\

: very clear and easy to understand

: able to think clearly

Full Definition of LUCID

a :  suffused with light :  luminous
b :  translucent <snorkeling in the lucid sea>
:  having full use of one's faculties :  sane
:  clear to the understanding :  intelligible
lu·cid·ly adverb
lu·cid·ness noun

Examples of LUCID

  1. His lucid history of this grim subject is scrupulously accurate, so far as I am able to judge … —Richard A. Posner, New Republic, 8 Apr 2002

Origin of LUCID

Latin lucidus, from lucēre (see lucent)
First Known Use: 1591

Synonym Discussion of LUCID

clear, transparent, translucent, limpid mean capable of being seen through. clear implies absence of cloudiness, haziness, or muddiness <clear water>. transparent implies being so clear that objects can be seen distinctly <a transparent sheet of film>. translucent implies the passage of light but not a clear view of what lies beyond <translucent frosted glass>. limpid suggests the soft clearness of pure water <her eyes were limpid pools of blue>.

clear, perspicuous, lucid mean quickly and easily understood. clear implies freedom from obscurity, ambiguity, or undue complexity <clear instructions>. perspicuous applies to a style that is simple and elegant as well as clear <a perspicuous style>. lucid suggests a clear logical coherence and evident order of arrangement <a lucid explanation>.

Rhymes with LUCID

LUCID Defined for Kids


adjective lu·cid \ˈlü-səd\

Definition of LUCID for Kids

:  having or showing the ability to think clearly <lucid behavior>
:  easily understood <lucid writing>
lu·cid·ly adverb <The problem was lucidly explained.>
Medical Dictionary


adjective lu·cid \ˈlü-səd\

Medical Definition of LUCID

:  having, showing, or characterized by an ability to think clearly and rationally
lu·cid·i·ty noun, plural lu·cid·i·ties


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