ETYM French contrôle a counter register, contr. from contr-rôle; contre (Latin contra) + rôle roll, catalogue. Related to Counter and Roll, Counterroll.
1. Power to direct or determine.
2. A mechanism that controls the operation of a machine; SYN. controller.
3. A relation of constraint of one entity (thing or person or group) by another.
4. A spiritual agency that is assumed to assist the medium during a seance.
5. (Physiology) Regulation or maintenance of a function or action or reflex etc.
6. The activity of managing or exerting control over something; SYN. controlling.
7. The economic policy of controlling or limiting or curbing prices or wages etc. + prikaži više

A rheostat that varies the current through an electric light in order to control the level of illumination.