Southeastern

Southeastern can be lowercase as a directional descriptor, but when used as part of a proper name it is capitalized, as in Southeastern United States. In British English, the corresponding form is often south-eastern.

Southeastern is a relative geographic designation rather than a fixed region; its exact boundaries depend on context and source.

In the United States, the Southeastern United States is a commonly used label for the southeastern portion of the country, typically encompassing parts of the Deep South and the Mid-Atlantic or broader southern states; there is no single official definition and the set of states varies by source.

In Europe, Southeastern Europe describes the geographic and cultural region on the Balkan Peninsula and surrounding areas. Boundaries are unsettled and the term is used in academic, political, and historical contexts.

In Asia, the term Southeast Asia is the standard region; adjacent uses like southeastern Asia appear in some texts as an alternative, but the conventional term is Southeast Asia. The adjective southeastern is used to describe things related to that region, such as Southeastern Asian languages or Southeastern Asian climate.

In sports and institutions, Southeastern is used in the names of organizations, including the Southeastern Conference, a major NCAA Division I athletic conference.