1. (

• limpid ,
• lucid ,
• luculent ,
• pellucid ,
• crystal_clear ,
• perspicuous

) (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" ;

2. (

• lucid

) having a clear mind; "a lucid moment in his madness" ;

3. (

• coherent ,
• logical ,
• lucid

) 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" ;

4. (

• crystalline ,
• crystal_clear ,
• limpid ,
• lucid ,
• pellucid ,
• transparent

) 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" ;