1) Area 2) Region 
The epigastrium (or epigastric region) is the upper central region of the abdomen. It is located between the costal margins and the subcostal plane. The epigastrium is one of the nine anatomical regions of the abdomen, along with the right and left hypochondria, right and left lateral regions (or flanks), right and left inguinal regions (or fossae...
• (n.) The upper part of the abdomen.
The upper central region of the abdomen between the costal margins and a line drawn horizontally across the lowest costal margin. ... (27 Sep 1997) ... 
(ep″ĭ-gas´tre-әm) epigastric region.
Ep`i·gas'tri·um noun [ New Latin , from Greek ....] (Anat.) The upper part of the abdomen. 
The upper part of the abdomen between the navel and the breast.
Type: Term Pronunciation: ep′i-gas′trē-ŭm Synonyms: epigastric region
Epigastrium: The part of the abdominal wall above the umbilicus (belly button). The hypogastrium is the part of the abdominal wall below the umbilicus. The abdominal wall can thus be divided into upper and lower halves. Or it can be further divided into quadrants by also drawing a vertical line through the umbilicus.
[n] - the region lying on or over the stomach (just below the sternum)
noun the region lying on or over the stomach (just below the sternum)
Greek epi = upon, and gaster = belly, hence, the upper median zone of the abdomen.
the upper and median part of the abdomen, lying over the stomach.