What is the definition of an adolf hitter

Adolf Hitler was a person, living in Austria and Germany in the beginning of 20th century, who was the leader of Nazi party and of Nazi Germany. People don't have definitions.

I guess you could use the phrase" Adolf Hitler" for someone very violent and evil thought, metaphorically, because Hitler is responsible for WW2 and the Holocaust.

So you know what happened and so it doesn’t repeat it’s self