A phenomenon where a person becomes aware that they are dreaming while still in the dream state. During a lucid dream, the dreamer can often exert some degree of control over their actions, the environment, or the narrative of the dream. This heightened awareness typically occurs in the REM (rapid eye movement) stage of sleep, when dreams are most vivid.

Lucid dreaming is often pursued for its potential benefits, such as exploring creativity, overcoming nightmares, and practicing skills in a risk-free environment. Techniques to induce lucid dreams include reality checks, maintaining a dream journal, and specific meditation or visualization practices.