Private property is capital is the means of production. Socialists believe that the means of production belong to everyone. So factories, farms, financial institutions, etc. — not just hospitals and infrastructure, but the entire engine of the economy.
Private property are things that are held by shareholders and landlords, not your own possessions.
Socialists believe fixed public assets like utilities and bridges and hospitals, belongs to everyone not a small class of monied interests.
This is why they are hated by both liberals and fascists.
Private property is capital is the means of production. Socialists believe that the means of production belong to everyone. So factories, farms, financial institutions, etc. — not just hospitals and infrastructure, but the entire engine of the economy.