tive, instructive, narrative, probative and supporting, one of six functional categories of records. [Archives] 
n.,
 A real or abstract thing. [Archives] 
n., In Geographic Information Systems, a thing that exists such as a building or a lake, which is distinguishable from another entity, cannot be divided into two or more similar entities, and about which information can be stored, possibly in terms of attributes, position, shape, and relationships. An entity class is a specified group of entities. [Scien