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Message in its most general meaning is the object of communication. Depending on the context, the term may apply to both the information contents and its actual presentation.

In the communications discipline, a message is information which is sent from a source to a receiver. Some common definitions include:

See also: instant messaging


In computing, under certain object-oriented programming languages such as Smalltalk and Objective-C, a message is an instruction to an object to perform some task. A message is similar to a member function, however in certain run-time environments such as Objective-C, messages can be forwarded if an object does not recognize — respond to — a certain message.