Lucid dreaming: The process of being aware that one is dreaming. Some researchers believe that in lucid dreaming, the individual may be able to change the outcome of the dream or control their degree of participation in the imaginary (dream) environment. Lucid dreams have been described as arising from either the sleeping or waking state. A number of ongoing studies are examining brain activity during sleep and dreaming to better characterize the phenomenon of lucid dreaming.
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