easily understood; completely intelligible or comprehensible

a lucid explanation.

characterized by clear perception or understanding; rational or sane

a lucid moment in his madness.

shining or bright.

clear; pellucid; transparent.

adjective

clouded , obscure , unclear , vague , cloudy , dark , gloomy , murky , shadowy , foggy , muddied , confused , puzzled , unreasonable

adjective

apprehensible , clear , clear-cut , comprehendible , comprehensible , crystal clear , distinct , explicit , fathomable , graspable , intelligible , knowable , limpid , luminous , pellucid , plain , translucent , transparent , transpicuous , unambiguous , unblurred , understandable , beaming , bright , effulgent , gleaming , incandescent , lambent , lustrous , radiant , refulgent , resplendent , crystalline , diaphanous , gauzy , glassy , obvious , pure , sheer , all there , compos mentis , cool , got head together , in right mind , normal , rational , reasonable , right , sane , sober , sound , together , see-through , brilliant , cogent , crystal , evident , sensible , shining