Final answer:
A vernacular region is an area that is identified by people based on shared cultural traits or beliefs rather than formal boundaries, such as 'Dixie' or the 'Midwest' in the United States.
Step-by-step explanation:
A vernacular region in geography is an area that people believe exists as part of their cultural identity. Unlike formal regions with clearly defined political boundaries, or functional regions defined by a central function such as a city's influence, vernacular regions have no precise borders. This type of region exists mostly in people's perceptions and may be characterized by a common sense of identity or cultural traits acknowledged by a group of people. The concept of a vernacular region is therefore quite fluid and can differ between individuals. Examples in the United States include regions referred to colloquially as the 'South', the 'Midwest', or 'New England', each with its own undefined boundaries that vary based on who you ask.
These regions, while not easily mappable because of their nebulous borders, are important to acknowledge and understand, as they provide insights into cultural and social geographies. Events and changes within these regions can often reflect or influence social dynamics, political movements, or cultural shifts. The prevalence of certain vernacular regions may evolve with time, reflecting changes in society and cultural attitudes.