nazi

a member of the National Socialist (German Workers') Party, led by Adolf Hitler, which controlled Germany from 1933 to 1945

a person who is cruel or demands that people obey them completely, or who has extreme and unreasonable beliefs about race

belonging to or connected with the National Socialist (German Workers') Party, which controlled Germany from 1933 to 1945:

Examples:

a member of the National Socialist German Workers’ Party that controlled Germany from 1933 to 1945 under Adolf Hitler, or someone who believes in fascism (= state control of social and economic life and extreme pride in country and race, with no political disagreement allowed)