When something is owned by the government — like a healthcare system, for example — and its ownership becomes privately held, it's called privatization.
If your governor had a plan to replace all the public schools in the state with private schools, you could describe it as privatization. People tend to have strong opinions about privatization, believing either that free enterprise and private companies increase efficiency, or that certain services are harmed by privatization, particularly education, healthcare, and law enforcement. At the heart of privatization is the word private, rooted in the Latin privatus, "belonging to the self rather than the state."
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