To place under government or group ownership or control
His formula was "to royalize France and to nationalize the monarchy."
(afterwards the duc) Decazes was to "nationalize the monarchy and to royalize France."
Sometimes countries simply nationalize industries, so that an enterprise once owned by a private company, often a foreign-based one, is taken over by the government or "the people."
nationalize the central bank.
nationalize the mines and allowed them to go back into private ownership.