To improve or enhance the quality or value of something. The new software update will enrich the user experience by adding more features.
To make someone wealthier. The successful business venture served to enrich the investors significantly.
To add nutrients to soil or food to improve its quality. Farmers often enrich the soil with compost to boost crop yields.
To increase the concentration of a particular isotope in a substance, especially uranium. The plant is capable of enriching uranium to five percent.