General English

General Science

  • noun the action of directing or working in a specific way
  • verb to make a machine, system or procedure work in a specific way


  • noun the process of restraining something or keeping something in order
  • noun a sample used as a comparison with the one being tested


  • verb to direct, to manage or to make a machine, system, procedure, etc., work in the correct way


  • noun the act of restricting or checking something or making sure that something is kept in check
  • verb to make sure that something is kept in check or is not allowed to develop

Cars & Driving

  • noun a device used to regulate the functioning of a system, either operated by the driver by means of a lever, knob or switch, or operating automatically
  • noun the ability of the driver to make the vehicle perform as required


  • noun a section of a computer or device that carries out instructions and processes signals
  • noun a key on a computer keyboard which sends a control character
  • noun data or a key that controls something


  • A circuit, device, component, piece of equipment, signal, mechanism, or system, or a combination of these, that operates, regulates, or manages. For instance, a control panel.
  • The operating, regulating, or managing effect a circuit, device, component, piece of equipment, signal, or system has.
  • The means by which a control system maintains the desired output.
  • A single factor or variable which is varied in two or more experiments in which the remaining factors and variables are held constant. This is done to better determine the influence of the factor or variable in question.
  • An object appearing on a computer screen, such as a push-button or scroll bar, which helps perform an action in a program.

Health Economics

  • (written as Control)
    In longitudinal studies or other kinds of trial, a control is an individual without the disease being investigated or one not receiving the treatment whose effects are being investigated, or someone without the baseline characteristics of interest being studied in a cohort study.

Information & Library Science

  • noun the power or authority to make decisions about how something is managed
  • verb to organise something so that it works the way you want it to


  • verb to have the power to decide what should happen to someone or something
  • verb to make sure that something is restricted or kept at the correct level


  • noun a person or group whose test data are used as a comparison in a study
  • verb to have the ability or authority to direct someone or something


  • noun the power to direct the actions of people or things


  • noun skill in using something or in performing


  • noun the power to keep somebody or something in order or to be able to direct them
  • verb to keep something or somebody in order or to limit what they are allowed to do

Origin & History of “control”

Implausible as it may seem, control’s closest relative in English is contra-rotating. It has its origins in a medieval method of checking accounts which involved a duplicate register, or ‘counter-roll’, as it was known (contrārotulus in medieval Latin, contrā meaning ‘opposite’ and rotulus being the diminutive of rota ‘wheel’). From the medieval Latin noun a verb was formed, contrārotulāre, meaning ‘check accounts by such means’, and hence ‘exert authority’. this passed into English via Anglo-Norman contreroller. The spelling of the agent noun controller as comptroller, still encountered in certain official designations, arises from an erroneous 16th-century association of the first syllable with count, from late Latin computus.