
Definition:
1 : to free (a people or area) from colonial status : to relinquish control of (a subjugated people or area).
2 : to free from the dominating influence of a colonizing power. Especially : to identify, challenge, and revise or replace assumptions, ideas, values, and practices that reflect a colonizer's dominating influence.
Variants: also British decolonisation
Source: https://www.merriam-webster.com/dictionary/decolonize