Clairvoyance is the psychic ability or power to see objects, and visions, or to gain information regardless of its distance. The visions may also be in the future, and some times in the past. Clairvoyance is an umbrella term which often refers to telepathy, spiritualism, psychic research, second sight, prophetic visions, and dreams.
Clairaudience, which is similar to clairvoyance, is the psychic ability to hear things from afar. Both phenomena can occur in normal state of consciousness, but also can be induced by drugs, fasting, illness, hyperesthesia, or scrying. A.G.H.