A slender flexible rod, stick, or twig, especially one used for whipping. The bushy tip of the tail of certain animals: a cow's switch. A thick strand of real or synthetic hair used as part of a coiffure. A flailing or lashing, as with a slender rod. A device used to break or open an electric circuit or to divert current from one conductor to another. A device consisting of two sections of railroad track and accompanying apparatus used to transfer rolling stock from one track to another. The act or process of operating a switching device. The result achieved by such an act. An exchange or a swap, especially one done secretly. A transference or shift, as of opinion or attention. Chiefly Southern U.S. To whip with or as if with a switch, especially in punishing a child. To jerk or swish abruptly or sharply: a cat switching its tail. To shift, transfer, or divert: switched the conversation to a lighter subject. To exchange: asked her brother to switch seats with her. To connect, disconnect, or divert (an electric current) by operating a switch. To cause (an electric current or appliance) to begin or cease operation: switched the lights on and off. Informal To produce as if by operating a control. Often used with on: switched on the charm. To move (rolling stock) from one track to another; shunt. To make or undergo a shift or an exchange: The office has switched to shorter summer hours. To swish sharply from side to side. switch off Informal To stop paying attention; lose interest.