In numerous countries, and some states in the US, convicted felons who have completed their sentence are not allowed to vote. Are those not democracies as we c

In numerous countries, and some states in the US, convicted felons who have completed their sentence are not allowed to vote. Are those not democracies as we currently understand it? For that matter, ALL countries that I am aware of that allow their citizens to vote set an arbitrary 'magic number' and don't let you vote unless you are at least that old. Are those not democracies as we currently understand it? In the United States, non-citizen residents are not allowed to vote. How is this any different from the ancient Greeks not allowing non-citizen residents to vote? Their democracy was not at all that different from our democracies today, it is the definition of "full citizen" that has changed.