What is the definition of regime?
The definition of regime is a mode or system of rule or government: a dictatorial regime.
It's when somebody or Several people take control over a land or several areas and lands and gain power of them
A dictatorship is a definition of a state in wich the government has 'dictates' its will. This definition includes the former Soviet union, Khadaffi's regime and Hitlers nazi Germany. These regimes were dictatorships although they regularly (some) held votes. So the right to vote has nothing to do with the definition of a dictatorship.
The Khmer Rouge committed the "Cambodian Genocide", but the name is a misnomer and the reason for this is specifically why it does not fit the classic definition of a genocide. The elimination of over 1.5 million Cambodians is more properly called the "Cambodian Democide". The distinction is that a genocide is a specific targeting of a group for extermination based on some inherent characteristic (race, ethnicity, sexual orientation, political leanings, etc.). The Khmer Rouge…