A dictatorship is a form of government with one ruler who abuses the ruling power arbitrarily.
A dictatorship is a government, characterized by one leader or cluster of leaders with either no party or a weak party, very little mass mobilization, and restricted political ism.
They don't typically come back to power through free constitutional elections; they typically head throughout coups, revolutions or states of emergency; and that they have absolute, sole power over their state.