1 : hairpiece consisting of a tress of false hair; used by women to give shape to a coiffure
2 : control consisting of a mechanical or electrical or electronic device for making or breaking or changing the connections in a circuit
3 : an event in which one thing is substituted for another
1 : flog with or as if with a flexible rod
2 : cause to go on or to be engaged or set in operation
3 : exchange or give (something) in exchange for