The word input is used as a noun (information received or the process of receiving it) and less often as a verb (to receive information; or to enter information that a program then uses as input).
In telecommunication, the term input has the following meanings:
- In a device, process, or channel, a point that accepts data.
- A state, or a sequence of states, of a point that accepts data.
- A stimulus, such as a signal or interference, that enters a functional unit, such as a telecommunications system, a computer, or a computer program.
Source: from Federal Standard 1037C