dictator

noun

• 1a ruler with total power over a country, typically one who has obtained power by force.
• a person who tells people what to do in an autocratic way or who determines behavior in a particular sphere:the prewar era was a period whose apple-cheeked dictator was Doris Day
• (in ancient Rome) a chief magistrate with absolute power, appointed in an emergency.

• 2a machine that records words spoken into it, used for personal or administrative purposes.