Disinvestment refers to the selling or liquidation of government assets or subsidiaries to achieve several objectives like reducing fiscal burden, improving public finances, and introducing competition. Reasons for disinvestment include meeting fiscal deficits and implementing government plans. The government established criteria for disinvestment and a process involving committees to review public sector undertakings and make recommendations. Privatization involves selling over 51% ownership and changing management, while disinvestment can range from diluting government stake to retaining control.