An on/off switch is a device that is used to turn something on or off. There are many different synonyms for this common phrase, including power switch, toggle switch, rocker switch, push-button switch, and button switch. These different terms can be used interchangeably depending on the context in which the on/off switch is being referred to. Some people might use a different word to describe the on/off switch in their specific industry or field, such as a light switch in the electrical trade or a brake switch in the automotive industry. Nevertheless, all of these words describe the same basic function of a switch that controls whether something is turned on or off.