Disinvestment means the selling of ownership of public enterprises to private sector or selling the share of public sector enterprises to private sector.
The implementation of liberalization took place step by step. The laws were removed for producers and investors, and then the foreign investments were invited.
If public sector sells less than $51\%$ of share then it is called minor disinvestment and if sell more than $51\%$ of share then it is called major disinvestment.