1. past tense and past participle of decolonise; to free (a country or region) from colonial rule or control
Usage: British English spelling (American English: decolonized); typically used in historical and political contexts
2. to remove colonial influence, attitudes, or structures from (an institution, curriculum, or society)
Usage: modern usage, especially in educational and cultural contexts

Examples

• India was decolonised in 1947 when it gained independence from British rule.
• Many African nations were decolonised during the 1960s.
• The university decolonised its curriculum to include more diverse perspectives.
• The museum decolonised its exhibits to better represent indigenous voices.
• After the war, the colonial powers gradually decolonised their territories.
• The movement sought to decolonise the minds of people still influenced by colonial thinking.