A geographic area is a region or space that is defined by physical or cultural characteristics. The term 'TERRAIN' refers to the physical features of an area, such as its landforms, vegetation, and climate. The word 'EAST' is used to describe a direction or location relative to another point, while 'ZONE' is used to refer to a specific area or region. Together, these three words can be used to describe a geographic area in terms of its physical features, location, and boundaries.