3 Answers
control |k?n?tr?l|
noun
1 the power to influence or direct people's behavior or the course of events : the whole operation is under the control of a production manager | the situation was slipping out of her control.
• the ability to manage a machine or other moving object : he lost control of his car | improve your ball control.
• the restriction of an activity, tendency, or phenomenon : pest control.
• the power to restrain something, esp. one's own emotions or actions : give children time to get control of their emotions.
• (often controls) a means of limiting or regulating something : growing controls on local spending.
• a switch or other device by which a machine is regulated : the volume control.
• the place where a particular item is verified : passport control.
• the base from which a system or activity is directed : communications could be established with central control | mission control.
• Bridge a high card that will prevent opponents from establishing a particular suit.
• Computing short for control key .
2 Statistics a group or individual used as a standard of comparison for checking the results of a survey or experiment : they saw no difference between the cancer patients and the controls.
3 a member of an intelligence organization who personally directs the activities of a spy.
verb ( -trolled , -trolling )
1 [ trans. ] determine the behavior or supervise the running of : he was appointed to control the company's marketing strategy.
• maintain influence or authority over : you shouldn't have dogs if you can't control them.
• limit the level, intensity, or numbers of : he had to control his temper.
• ( control oneself) remain calm and reasonable despite provocation : he made an effort to control himself.
• regulate (a mechanical or scientific process) : the airflow is controlled by a fan.
• [as adj. ] ( controlled) (of a drug) restricted by law with respect to use and possession : a sentence for possessing controlled substances.
2 Statistics [ intrans. ] ( control for) take into account (an extraneous factor that might affect results) when performing an experiment : no attempt was made to control for variations | [as adj. ] ( controlled) a controlled trial.
• check; verify.
PHRASES
in control able to direct a situation, person, or activity : I felt calm and in control.
out of control no longer possible to manage : fires burning out of control.
under control (of a danger or emergency) being dealt with successfully and competently : it took two hours to bring the blaze under control.
DERIVATIVES
controllability |k?n?tr?l??bilit?| noun
controllable adjective
controllably |-?bl?| adverb
ORIGIN late Middle English (as a verb in the sense [check or verify accounts,] esp. by referring to a duplicate register): from Anglo-Norman French contreroller ‘keep a copy of a roll of accounts,’ from medieval Latin contrarotulare, from contrarotulus ‘copy of a roll,’ from contra- ‘against’ + rotulus ‘a roll.’ The noun is perhaps via French contrôle.
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