1. to remove national character, control, or ownership from something; to make no longer national in scope or character
Usage: third-person singular present tense of denationalize; formal, often used in political or economic contexts
2. to deprive a person of national citizenship or national status
Usage: formal, legal context

Examples

• The government denationalizes the railway system to encourage private investment.
• The policy denationalizes formerly state-owned industries.
• International agreements denationalize certain waterways for shared use.
• The court denationalizes individuals who have committed treason.
• Economic reforms denationalize key sectors of the economy.