The quality of being areal or having extent; the characteristic of occupying or covering a defined geographical or spatial region.
From 'areal' (relating to area) + '-ity' (noun suffix indicating a quality or state). This is a rare technical term primarily used in geographical and spatial analysis to describe the fundamental nature of territorial or regional phenomena.
The word 'areality' almost never appears in English except in geography textbooks, but it perfectly captures the idea that some things are fundamentally defined by the space they cover, not the line they trace.
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