When I say “capitalism,” I mean a full, pure, uncontrolled, unregulated laissez-faire capitalism—with a separation of state and economics, in the same way and for the same reasons as the separation of state and church. — AYN RAND
Capitalism is a social system based on the recognition of individual rights, including property rights, in which all property is privately owned.
Under capitalism the state is separated from economics (production and trade), just like the state is separated from religion.
Capitalism is the system of laissez faire. It is the system of political freedom.