Area (noun)

1. A particular geographical region or part of a country or the world.
2. A particular field of study or sphere of activity or interest.
3. The extent or measurement of a surface or piece of land.

Origin:

Late middle english: from latin area "open space, sandy ground", later "threshing floor".

Examples:

1. The area around the lake is a popular spot for camping.
2. He was an expert in the area of artificial intelligence.
3. The area of the square can be calculated by multiplying the length of one side by itself.
4. The area was hit by a severe storm.
5. The development of new technologies is a rapidly growing area of research.