Telepathy ----- mind-to-mind communication between two individuals under conditions in which it is not possible for information to pass between them through the physical environment using the five senses. Examples: having a hunch that a specific person will unexpectedly call just before he or she does; dreaming about a person and his or her problem although no one has told you about it.

Clairvoyance ----- conscious awareness of events or conditions that are (1) unknown at that moment to all other minds and (2) removed from the individual to such an extent that no information can be received about them through the environment using the five senses. Examples: a psychic accurately stating where a lost, ancient treasure is buried; Edgar Cayce accurately diagnosing an unknown physical ailment in a person.

Precognition ----- conscious awareness of an event or condition before it happens (in this case it should be something relatively unpredictable by logic). Examples: guessing correctly many times in a row what number will come up on a randomly tossed die; accurately predicting the exact score of a football game.

Psychokinesis (or PK) ----- to control or change a condition in the physical world (apart from one's own body) using only the mind. Examples: moving an object on a table using only thought; changing the nature of a solution of chemicals in a flask using only thought directed towards it.

Psi ----- a shortened form of "psychic ability"; a term used to include any form of ESP (telepathy, clairvoyance and precognition, among others), as well as psychokinesis.