What is the meaning of the word "switch"?

Definitions:

a basketball maneuver in which defending players change the target they're guarding in mid-play noun
- The coach called for a switch in order to shake up the opposing team.
a flexible implement used as an instrument of punishment noun
- They have terrible memories of being beaten with a switch.
control consisting of a mechanical or electrical or electronic device for making or breaking or changing the connections in a circuit noun
- I installed a switch to control the lights in the room.
hairpiece consisting of a tress of false hair noun
- The ballroom dancer always wore a long blonde switch as part of their performance costume.
railroad track having two movable rails and necessary connections noun
- The train was guided onto a side track by a switch.
the act of changing one thing or position for another noun
- The candidate's switch on abortion cost them the election.
to cause to go on or to be engaged or set in operation verb
- Please switch off the light before you leave.
to change over, change around, as to a new order or sequence verb
- I switched places with the next person in line.
to flog with or as if with a flexible rod verb
- The handler switched the cattle.
to lay aside, abandon, or leave for another verb
- We switched to a different brand of beer.