Lucid means clear and easy to understand, especially about language or thinking. It can also describe a mental state where someone is thinking normally after being confused or sick.
From Latin 'lucidus,' meaning 'bright, shining, clear,' from 'lux' meaning 'light.' The word shifted from physical brightness to mental clarity.
When people talk about 'lucid dreams,' they literally mean 'clear' dreams, where you know you’re dreaming and can sometimes control it. Your brain treats awareness like turning on a light in a dark room—suddenly the scene makes sense.
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