switcher

noun

Etymology: Etymology tree English switch English -er English switcher From switch + -er.

1. One who or that which operates a switch.

   “They all love frugality and conservation; they are manic savers of bits of string and switchers-off of lights.”

2. One who or that which switches, that is, changes in some way.

   “career switcher”

   “Switch to Acme brand razors for a closer shave! For a limited time, we'll pay you to be a switcher!”

3. A switchmode power supply.
4. A railway locomotive used for shunting (switching).
5. The yardman who operates such an engine, or performs a similar role in a trucking depot.
6. Synonym of vision mixer (“device for selecting between video sources”).