Structural Fund is the funds for economic development purposes to implement the regional policy of the European Union.
Reference Definition by OECD: Structural funds are funds intended to facilitate structural adjustment of specific sectors, regions, or combinations of both, in the European Union. They include the European Regional Development Fund (ERDF), the European Social Fund (ESF), the Guidance Section of European Agricultural Guidance and Guarantee Fund (EAGGF) and the Financial Instrument for Fisheries Guidance (FIFG). Assistance is concentrated on three priority objectives, two regional and a horizontal objective for human resources.