Directly from Latin 'ārea' (level ground, threshing floor), generalized from a flat workspace to any defined region.
A region or part of a town, country, or the world; a measured extent of a surface.
Directly from Latin 'ārea' meaning 'level ground, open space, threshing floor.' Originally a flat piece of ground where grain was threshed, then generalized to any defined space. Key roots: ārea (Latin: "open ground, threshing floor").