FDI full form : Foreign Direct Investment. It can also be defined as an investment made to acquire lasting interest in an enterprise operating in an economy other than that of the investor. FDI full form in India is Foreign Direct Investment is a vital source of funds for India's economic development. Economic liberalisation began in India in the aftermath of the 1991 crisis, and FDI has steadily increased in the country since then. FDI full form is Foreign Direct Investment, and it refers to the process or act of purchasing an ownership stake in a foreign organisation. In general, this business term is used to describe the decision of a company to acquire a substantial stake in a business that is located in a foreign region. FDI , a subset of international factor movements, is characterized by controlling ownership of a business enterprise in one country by an entity based in another country.