AskDefine | Define input

Dictionary Definition



1 signal going into an electronic system [syn: input signal]
2 any stimulating information or event; acts to arouse action [syn: stimulation, stimulus, stimulant] v : enter (data or a program) into a computer

User Contributed Dictionary



  • /'ɪnpʊt/


  1. Something fed into a process with the intention of it shaping or affecting the outputs of that process.

Derived terms

Related terms


something fed into a process


  1. To enter data.


Extensive Definition

Input is the term denoting either an entrance or changes which are inserted into a system and which activate/modify a process. It is an abstract concept, used in the modeling, system(s) design and system(s) exploitation. It is usually connected with other terms, e.g., input field, input variable, input parameter, input value, input signal, input device and input file.


From the most general systemics perspective, input is a subjective concept and depends on how the system is used. In such sense, the same system can have different inputs in different applications.
In the case of a process description/model, the concept input is closely connected with the concept output. Here, what enters is called input and what exits is called output.
Example: For an abstract system A(x,y,p), where x,y are variables and p is a parameter, x may denote input (variable) and y may denote the output for a process: y = f(p,x), but, for another goal/(system application), the system A can be the carrier of a process x = g(p,y), where y is an input and x is an output.
Usually, in the modeling of a problem/process, input are these variables which are known and output are those unknown to us yet.
In recognition that the quality of the input can be crucial to the value of the output, a famous saying teaches us "Garbage IN, Garbage OUT" (GIGO).


External links

input in Arabic: مدخلات
input in Danish: Input
input in Spanish: Entrada
input in French: Intrant
input in Korean: 입력
input in Italian: Input
input in Hebrew: קלט
input in Dutch: Ingang (elektronica)
input in Japanese: 入力
input in Sicilian: Ntrata
input in Slovak: Input
input in Serbian: Инпут

Synonyms, Antonyms and Related Words

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