The term clairvoyance (derived from French clair meaning"clear" and voyance meaning "vision") describes the ability to gain information about an object, person, location or physical event through extrasensory perception. A person who has this ability is called a clairvoyant ("one who sees clearly").
Many readers are clairvoyant - meaning they either hear, see, feel or even smell - things about another person or situation. Some use tools such as Tarot or other cards, Tea leaves, or holding onto an object that belongs to the person [called Psychometry] although tools are not always necessary.
For some clairvoyance is innate ability from childhood. Others may find it emerging later in life or after some difficult experiences. Clairvoyance or psychic ability can be developed or learned through various physic exercises, by use of various meditating techniques.