Longman Dictionary of Contemporary English homepage

Date: 1500-1600
Language: Latin
Origin: lucidus

lucid

adjective
     
lu‧cid
1 expressed in a way that is clear and easy to understand:
You must write in a clear and lucid style.
2 able to understand and think clearly, used especially about someone who is not always able to do this:
In her more lucid moments the old lady would talk about her past.
lucidly adverb:
He was lucidly aware of political realities.
lucidity noun [uncountable]

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