1. something that is put in.
  2. the act or process of putting in.
  3. the power or energy supplied to a machine.
  4. the current or voltage applied to an electric or electronic circuit or device.Compare output(def 4).
  5. Computers.
    1. data to be entered into a computer for processing.
    2. the process of introducing data into the internal storage of a computer.
  6. contribution of information, ideas, opinions, or the like: Before making a decision we need your input.
  7. the available data for solving a technical problem.
  8. Scot. a monetary contribution, as to charity.


  1. of or relating to data or equipment used for input: The goal is to reduce input costs.

verb (used with object), in·put·ted or in·put, in·put·ting.

  1. Computers. to enter (data) into a computer for processing.
  2. to contribute (ideas, information, or suggestions) to a project, discussion, etc.


  1. the act of putting in
  2. that which is put in
  3. (often plural) a resource required for industrial production, such as capital goods, labour services, raw materials, etc
  4. electronics
    1. the signal or current fed into a component or circuit
    2. the terminals, or some other point, to which the signal is applied
  5. computing the data fed into a computer from a peripheral device
  6. (modifier) of or relating to electronic, computer, or other input

verb -puts, -putting, -put or -putted

  1. (tr) to insert (data) into a computer

1793, “a sum (of cash) put in,” from in + put. Computing sense of “data fed into a machine” is from 1948; the verb in the computing sense is attested from 1946. There was a Middle English verb input (late 14c.) meaning “to put in, place, set,” but it died out long before this.

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