Question

What type of region does not have agreed-upon boundaries, and takes on meaning over time (whether true or not) to one or more individuals?

Answer 1

The type of region you're describing is often referred to as a "perceptual region" or "vernacular region." These regions are defined by the perceptions and feelings of the people within or around them rather than by formal or agreed-upon boundaries. Over time, the meaning and significance of these regions can evolve, influenced by cultural, social, and individual contexts. This can include areas like "the South" in the United States or "the Midwest," where boundaries may vary based on personal experiences and cultural connotations rather than precise geographical delineations.