The office, or the term of office, of a dictator; hence, absolute power.
dictatorship
If by ruler you mean one person or a small group, then it would be called a "Dictatorship".
how can a Dictatorship be classified
Yes, one person or group.
It is still a democracy. Disagreeing with a point of view doesn't mean the country has become a dictatorship. I see no evidence the US has abandoned it's democratic roots.
Dictatorship.
in a dictatorship rulers
Dictatorship
No, Chad is not a dictatorship.
Dictator is a person who gets land, money, ect. by threatening or getting it unfairly.
Dictatorship.
If you mean when Hitlers dictatorship then it's called 'The Holocaust'.