One who controls something. / (electronics) Any electric or mechanical device for controlling a circuit or system.

plural of controller

(transitive) To exercise influence over; to suggest or dictate the behavior of.

(countable, uncountable) Influence or authority over something. / The method and means of governing the performance of any apparatus, machine or system, such as a lever, handle or button.

plural of control

Third-person singular simple present indicative form of control

Inhibited or restrained in one's words and actions. / Resulting from a comparison with control samples. / (in combination) Under the control of the specified entity.

simple past tense and past participle of control

(chiefly Britain) Exerting control over a person or thing.

present participle of control