Epeirogenic movement refers to broad, relatively slow, vertical movements of the Earth’s crust that result in the formation of large-scale features such as plateaus, basins, and continental interiors. Unlike orogenic movements, which are associated with mountain building, epeirogenic movements are typically not associated with significant folding or faulting.
Source Levandowski, W., & Jones, C. H. (2015). “Epeirogeny or Eustasy? Gauging Sea Level with Paleozoic Epeirogeny in the Central United States.” Geology, 43(2), 171-174.