Definition of megalography in US English:

megalography

noun

rare
  • Originally: drawing on a large scale. Later: the artistic depiction of things considered greatly significant, such as legends of the gods or events of history.

Origin

Early 18th century; earliest use found in Nathan Bailey (d. 1742), lexicographer and schoolmaster. From classical Latin megalographia painting on a large scale or with large-scale figures (Vitruvius; in subsequent art criticism sometimes taken to refer to depictions of grand and elevated subjects) from ancient Greek μεγαλο- + -γραϕία. Compare French mégalographie.