Disinvestment:
Disinvestment refers to the process of selling or transferring shares or assets held by the government or public sector entities to private entities. It is a strategic move to reduce the government's stake in public sector enterprises and raise funds for various purposes. When 50% or more of shares are transferred to private entities, it can be considered as a form of disinvestment.

Key Points:
- Disinvestment is a common practice adopted by governments worldwide to reduce their involvement in the economy and promote private sector participation.
- The purpose of disinvestment can vary from raising funds for the government to improving the efficiency and performance of public sector entities.
- When 50% or more of shares are transferred to private entities, it signifies a significant reduction in the government's ownership and control over the entity.
- Disinvestment can be carried out through various methods such as public offerings, strategic sales, and privatization.
- It is important to note that disinvestment does not necessarily mean complete privatization. The government may still retain a minority stake in the entity even after transferring a majority of shares to private entities.
- Disinvestment can have both positive and negative impacts. On one hand, it can inject private capital and expertise into public sector entities, leading to improved efficiency and performance. On the other hand, it can also result in job losses and reduced government control over strategic sectors.

Divestment:
Divestment is a broader term that refers to the process of selling or transferring assets, including shares, by any entity, not just the government. It can be carried out by individuals, companies, or organizations to reduce their stake in a particular business or sector. When 50% or more of shares are transferred to private entities, it can be considered as a form of divestment.

Key Points:
- Divestment is commonly undertaken by companies or investors to reallocate their resources or reduce their exposure to a particular business or industry.
- The reasons for divestment can vary, including financial considerations, strategic realignment, or regulatory requirements.
- When 50% or more of shares are transferred to private entities, it indicates a significant reduction in the entity's ownership and control over the business.
- Divestment can be carried out through various methods such as selling shares on the stock market, private negotiations, or mergers and acquisitions.
- It is important to carefully consider the implications of divestment, as it can impact the entity's financial position, market presence, and overall strategy.
- Divestment can be a strategic move to unlock value, streamline operations, or focus on core competencies.

In conclusion, when 50% or more of shares are transferred to private entities, it can be considered as a form of disinvestment or divestment, depending on the context. Disinvestment specifically refers to the government's sale or transfer of shares, while divestment is a broader term that encompasses any entity's reduction in ownership or control. The specific implications and motivations behind the transfer of shares should be carefully analyzed to understand the broader impact on the entity and the economy.