WordReference Random House Learner's Dictionary of American English © 2017
con•trol /kənˈtroʊl/USA pronunciation   v.,  -trolled, -trol•ling, n. 
v. [+ object]
  1. to regulate, govern, or command;
    manage:The pilot controlled the plane from the cockpit.
  2. to hold (something) in check;
    hold (something) back:to control one's emotions.
  3. to prevent the spread of:The firefighters worked to control the forest fire.

n. 
  1. the act or power of controlling:[uncountable]Who has control over the newspaper now?
  2. [uncountable] check or restraint: My anger was under control.
  3. [countable] a person who acts as a check;
    controller.
  4. Mechanical Engineeringcontrols, [plural] an arrangement of devices, such as switches, for regulating or directing the operation of a machine:The controls are easy to understand and within easy reach of the driver.
Idioms
  1. at the controls, in charge of;
    managing;
    directing:Is anyone at the controls at headquarters?

con•trol•la•ble, adj.: At this point the problem is still controllable.
con•trol•la•bly, adv. 
con•trol•ling, adj. [before a noun]has a controlling interest in the company.

WordReference Random House Unabridged Dictionary of American English © 2017
con•trol  (kən trōl),USA pronunciation v.,  -trolled, -trol•ling, n. 
v.t. 
  1. to exercise restraint or direction over;
    dominate;
    command.
  2. to hold in check;
    curb:to control a horse; to control one's emotions.
  3. to test or verify (a scientific experiment) by a parallel experiment or other standard of comparison.
  4. to eliminate or prevent the flourishing or spread of:to control a forest fire.
  5. [Obs.]to check or regulate (transactions), originally by means of a duplicate register.

n. 
  1. the act or power of controlling;
    regulation;
    domination or command:Who's in control here?
  2. the situation of being under the regulation, domination, or command of another:The car is out of control.
  3. check or restraint:Her anger is under control.
  4. a legal or official means of regulation or restraint:to institute wage and price controls.
  5. a standard of comparison in scientific experimentation.
  6. a person who acts as a check;
    controller.
  7. a device for regulating and guiding a machine, as a motor or airplane.
  8. controls, a coordinated arrangement of such devices.
  9. prevention of the flourishing or spread of something undesirable:rodent control.
  10. Sport[Baseball.]the ability of a pitcher to throw the ball into the strike zone consistently:The rookie pitcher has great power but no control.
  11. Stamps[Philately.]any device printed on a postage or revenue stamp to authenticate it as a government issue or to identify it for bookkeeping purposes.
  12. a spiritual agency believed to assist a medium at a séance.
  13. the supervisor to whom an espionage agent reports when in the field.
con•trolla•ble, adj., n. 
con•trol′la•bili•ty, con•trolla•ble•ness, n. 
con•trolla•bly, adv. 
con•trolless, adj. 
con•trolling•ly, adv. 
  • Anglo-French contreroller to keep a duplicate account or roll, derivative of contrerolle (noun, nominal). See counter-, roll
  • late Middle English co(u)ntrollen (verb, verbal) 1425–75
    • 1.See corresponding entry in Unabridged manage, govern, rule.
    • 2.See corresponding entry in Unabridged restrain, bridle, constrain.
    • 6.See corresponding entry in Unabridged management, government, reign, rule, mastery. See  authority. 

'controls' also found in these entries:
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