(programming, languages) An entity of which the value can be passed as a parameter, but that can neither be returned from a function, nor be assigned to a variable. (Used by Raphael Finkel, the first-class object does not need to have run-time constructability according to his definition.)

(programming, languages) An entity that can be constructed at run-time, passed as a parameter, returned from a function, or assigned into a variable.

(architecture, computing, design) A behavioural design pattern that describes the uses of null objects and their behavior (or the lack of them).

plural of object adapter pattern

(software, object-oriented programming) An adapter pattern where the adapter contains an instance of the class it wraps.

(figuratively) Something that attracts a great deal of attention because of its superficial characteristics. / Used other than figuratively or idiomatically: see bright, shiny, object.

(astronomy) A near-Earth asteroid or comet with an orbit such that it has the potential to make close approaches to the Earth and is of a size large enough to cause significant regional damage in the event of impact.

plural of object pool pattern

(programming) A creational design pattern that uses a set of initialised objects kept ready to use, rather than allocating and destroying them on demand.

(software engineering) A piece of middleware in distributed software that enables program calls from one computer to another via a network.