1 [data models] In GIS, a digital representation of a spatial or nonspatial entity. Objects usually belong to a class of objects with common attribute values and behaviors.
2 [programming] In object-oriented programming, an instance of the data structure and behavior defined by a class.
3 [software] In computing, a piece of software that performs a specific task and is controlled by another piece of software, called a client. For example, an object is often the interface by which an application program accesses an operating system and other services.
4 [ESRI software] In ArcMap, ArcScene, or ArcGlobe, the camera, view, table or layer to which an animation track is attached.