Definition

1. Adjective:
   • Clear and easy to understand: Expressed in a way that is easily comprehensible; characterized by clear perception or understanding.
   • Bright or shining: (Literary) Emitting or reflecting light; luminous.
   • Mentally clear; rational: Characterized by full use of one's faculties; sane or rational, especially in intervals between periods of confusion or illness.

Examples of Usage

• Clear and easy to understand:
  • The professor gave a lucid explanation of the complex theory.
  • Her writing is remarkably lucid and accessible.
• Mentally clear; rational:
  • Despite his fever, he had lucid moments where he could give instructions.
  • The patient was lucid and answered all the doctor's questions coherently.
• Bright or shining (Literary):
  • The lucid surface of the lake reflected the mountains perfectly.

Advanced Usage

• "Lucid interval": A temporary period of sanity or clarity of mind, especially in someone suffering from a mental disorder.
  • During a rare lucid interval, the patient recognized his family.
• "Lucid dream": A dream in which the dreamer is aware that they are dreaming and may be able to exert some control over the dream.
  • She practiced techniques to induce lucid dreams.

Variants and Related Words

• Lucidity (n): The quality of being lucid; clarity of thought or style.
  • The lucidity of his argument was convincing.
• Lucidly (adv): In a lucid manner.
  • She lucidly outlined the steps for the project.

Synonyms

• Clear: Easy to perceive, understand, or interpret.
• Coherent: Logical and consistent.
• Perspicuous: Clearly expressed and easily understood.
• Transparent: Easy to perceive or detect.

Antonyms

• Confusing: Difficult to understand; unclear.
• Obscure: Not clearly expressed or easily understood.
• Incoherent: Unclear or confusing in thought or speech.

Related Idioms and Phrases

• "Lucid as day": Extremely clear and obvious.
  • The instructions were lucid as day; there's no way to misunderstand them.
• "A lucid streak": A period of clear, rational thinking.
  • Even in his old age, he still has lucid streaks where his wit is sharp.

Adjective

1. transmitting light; able to be seen through with clarity
   • the cold crystalline water of melted snow
   • crystal clear skies
   • could see the sand on the bottom of the limpid pool
   • lucid air
   • a pellucid brook
   • transparent crystal
2. capable of thinking and expressing yourself in a clear and consistent manner
   • a lucid thinker
   • she was more coherent than she had been just after the accident
3. having a clear mind
   • a lucid moment in his madness
4. (of language) transparently clear; easily understandable
   • writes in a limpid style
   • lucid directions
   • a luculent oration- Robert Burton
   • pellucid prose
   • a crystal clear explanation
   • a perspicuous argument