Definition from Wiktionary, the free dictionary
presentity (plural presentities)
- (Internet, telecommunications) An entity (usually a human) which provides information about its presence (whether it is available and willing to communicate through communication services).
- Users of an instant messaging service are presentities that may show themselves as online, offline, or away.
- Day, M., J. Rosenberg, and H. Sugano. A Model for Presence and Instant Messaging. RFC 2778. February 2000.