Turn off can be replaced or expressed in various forms and synonyms. Some of the synonyms that can be used for the term "turn off" are shut down, switch off, power down, kill, stop, and deactivate. Turn off is generally used to describe the act of turning off a device or equipment. It can also be used to describe the action of stopping a process or ending a conversation. When we say "turn off the lights," it means to switch off the lights or put them off. Similarly, power down refers to the process of switching off or deactivating electronic devices. All in all, there are several synonyms for "turn off" that can be used interchangeably to convey the same meaning.