transitive verb. To exercise authoritative or dominating influence over; direct: synonym: conduct.

transitive verb. To adjust to a requirement; regulate.

transitive verb. To hold in restraint; check.

transitive verb. To reduce or prevent the spread of.

transitive verb. undefined

transitive verb. To verify or regulate (a scientific experiment) by conducting a parallel experiment or by comparing with another standard.

transitive verb. To verify (a financial account, for example) by using a duplicate register for comparison.

noun. Authority or ability to manage or direct.

noun. One that controls; a controlling agent, device, or organization.

noun. undefined

noun. An instrument.

noun. A set of such instruments.

noun. A restraining device, measure, or limit; a curb.

noun. undefined

noun. A standard of comparison for checking or verifying the results of a scientific experiment.

noun. An individual or group used as a standard of comparison in a scientific experiment, as a group of subjects given an inactive substance in an experiment testing a new drug administered to another group of subjects.

noun. An intelligence agent who supervises or instructs another agent.

noun. A spirit presumed to speak or act through a medium.

noun. A book-register or account kept to correct or check another account or register; a counter-register.

noun. Check; restraint: as, to speak or act without control; to keep the passions under control.

noun. . The act or power of keeping under check or in order; power of direction or guidance; authority; regulation; government; command.

noun. Synonyms Influence, Ascendancy, etc. (see authority), direction, charge, regulation.

To check or ascertain the accuracy of, as by a counter-register or double account, or by experiment.

To prove by counter-statements; confute; convict.

To exercise control over; hold in restraint or check; subject to authority; direct; regulate; govern; dominate.

To have superior force or authority over; overpower.

Synonyms 3. Rule, Regulate, etc. (see govern), curb, restrain, direct.

noun. Whatever serves to control or check; particularly, a standard of comparison by which, as in scientific investigation or experiment, inferences or results already obtained are checked.

noun. A person or persons who control a business, or act as a check on others concerned.

noun. In spiritualism, the supposed spirit who is alleged to control or direct the action and utterances of a medium.

noun. In racing with motor-cars or motor-cycles, the authorized persons along the route who observe and record the times of arrival and departure of the cars, maintain the time and rate schedule if there is any, and enforce the regulations of the contest.

Of the nature of or used as a control.

noun. A duplicate book, register, or account, kept to correct or check another account or register; a counter register.

noun. That which serves to check, restrain, or hinder; restraint.

noun. Power or authority to check or restrain; restraining or regulating influence; superintendence; government.

noun. The complete apparatus used to control a mechanism or machine in operation, as a flying machine in flight

noun. Any of the physical factors determining the climate of any particular place, as latitude,distribution of land and water, altitude, exposure, prevailing winds, permanent high- or low-barometric-pressure areas, ocean currents, mountain barriers, soil, and vegetation.

noun. in research, an object or subject used in an experimental procedure, which is treated identically to the primary subject of the experiment, except for the omission of the specific treatment or conditions whose effect is being investigated. If the control is a group of living organisms, as is common in medical research, it is called the control group.

noun. the part of an experimental procedure in which the controls{6} are subjected to the experimental conditions.

noun. the group of technical specialists exercising control by remote communications over a distant operation, such as a space flight.

noun. See under Board.

transitive verb. To check by a counter register or duplicate account; to prove by counter statements; to confute.

transitive verb. To exercise restraining or governing influence over; to check; to counteract; to restrain; to regulate; to govern; to overpower.

transitive verb. to assure the validity of an experimental procedure by using a control{7}.

verb. To exercise influence over, to suggest or dictate the behavior of, oversit.

noun. Influence or authority over.

noun. A separate group or subject in an experiment against which the results are compared where the primary variable is low or nonexistence.

noun. The method and means of governing the performance of any apparatus, machine or system, such as a lever, handle or button.

noun. restraint or ability to contain one's emotions, or self-control.

noun. A security mechanism, policy, or procedure that can counter system attack, reduce risks, and resolve vulnerabilities; a safeguard or countermeasure.