Lucid dreaming is the ability to consciously recognize, perceive and modify the dream state. "Lucid" dreamers report being able to freely remember the circumstances of waking life, to think clearly, and to act deliberately upon reflection, all while experiencing a dream world that seems vividly real.

Most persons have at least one lucid dream during their life, often in their childhood. However even with training, achieving such a dream state on a regular basis is uncommon. Lucid dreams are notable for their durability in memory, exceptionally more so than with regular dreams. Lucid dreamers regularly describe their dreams as exciting, colourful and fantastic (in the literal sense), and often compare their dream to a spiritual experience.

Despite the difficulty of achieving a lucid dream on a regular basis, techniques have been developed to achieve the state intentionally. A number of universities conduct research into both the condition and these techniques (notably Stanford), as do some independent agencies such as The Lucidity Institute. At present there are no known cases where lucid dreaming has caused damage on either the psychological and physiological level.

One method of testing whether one is dreaming or not is to read a text look away and read it again. In the real world the text will not change, while in a dream, the text will often change.

Glossary: Out of Body Experience | Astral Projection | Remote Viewing | Lucid Dreaming | Extra Sensory Perception | Psychic Abilities