A message written on a scrap of paper, rolled-up and put in an empty bottle and set adrift on the ocean; traditionally, a method used by castaways to advertise their distress to the outside world.

(communication, computing) A message conveyed through an instant messaging program.

(communication, computing) To convey a message via an instant messaging program.

(telecommunications) a message sent in the forward direction that contains (a) address information, (b) the signaling information required to route and connect a call to the called line, (c) service-class information, (d) information relating to user and network facilities, and (e) call-originator identity or call-receiver identity.

A signal or message embedded in another object, designed to pass below the normal limits of perception.

(politics) publicly stating or supporting a policy counter to the official party policy.

(idiomatic) Any communication that is contradictory, inconsistent, or unclear, especially in its motive or intent.

plural of message queue

(computing) A queue onto which messages may be placed for delivery between components as part of interprocess communication.

Sending and receiving written messages on mobile phones, or the technical system which allows this.