noun
area
AIR-ee-uh/ˈeriə/
A defined expanse of surface or space.
The green lawn forms a clearly bounded area within the surrounding gravel.

Etymology
Latin area named level ground or open space, such as a building site or threshing floor. The meaning broadened to any bounded portion of a surface, whether open or not.
In context
now let's cut a cross-section of this area of the thorax to better understand pleural membranes and the pleural reflections here is the posterior part of the thorax you can see the spine
More examples
- The rectangle has an area of twenty square feet.
- Her main area of research is early childhood learning.
- Several areas of the city lost power.
Forms
area · areas