What does ‘disinvestment’ refer to in the context of privatisation?

The government selling part of its equity in public sector enterprises (PSEs)/ सरकार द्वारा सार्वजनिक क्षेत्र के उद्यमों (PSEs) में अपनी हिस्सेदारी का कुछ हिस्सा बेचना