The rebel army now controls nearly half the country.
The lights on stage are controlled by this computer.
She struggled to control the cart as it rolled before her down the steep, bumpy road.
He controlled the volume by turning the radio's knob.
A thermostat controls the room's temperature.
Origin of CONTROL
Middle English countrollen, from Anglo-French contrerouler, from contreroule copy of an account, audit, from Medieval Latin contrarotulus, from Latin contra- + Medieval Latin rotulus roll — more at roll
a (1): an experiment in which the subjects are treated as in a parallel experiment except for omission of the procedure or agent under test and which is used as a standard of comparison in judging experimental effects —called also control experiment(2): one (as an organism, culture, or group) that is part of a control
b: a device or mechanism used to regulate or guide the operation of a machine, apparatus, or system
c: an organization that directs a spaceflight <mission control>
d: a personality or spirit believed to actuate the utterances or performances of a spiritualist medium