control >> /kənˈtroʊl/
Definition: [verb] Determine the behavior or supervise the running of.
Example: he was appointed to control the company's marketing strategy
Definition: [verb] Take into account (an extraneous factor that might affect results) when performing an experiment.
Example: no attempt was made to control for variations
Definition: [noun] The power to influence or direct people's behavior or the course of events.
Example: the whole operation is under the control of a production manager
Definition: [noun] A group or individual used as a standard of comparison for checking the results of a survey or experiment.
Example: they saw no difference between the cancer patients and the controls
Definition: [noun] A member of an intelligence organization who personally directs the activities of a spy.
Example: he sat with his KGB control as the details of his new assignment were explained
Definition: [noun] A high card that will prevent the opponents from establishing a particular suit.