An igneous province is a region of extensive igneous rock formations, often associated with large-scale volcanic activity and the emplacement of large volumes of magma. These provinces, such as the Deccan Traps or the Siberian Traps, are crucial in understanding the processes of mantle plume activity, continental break-up, and mass extinction events.
Source Courtillot, V. E., & Renne, P. R. (2003). “On the Ages of Flood Basalt Events.” Comptes Rendus Geoscience, 335(1), 113-140.