Which term describes communities that don't have easily defined boundaries?

The term that accurately describes communities without easily defined boundaries is "Fluid." Fluid communities are characterized by their dynamic and shifting nature, making it challenging to delineate specific geographic or social limits. This variability can manifest in various forms, such as online communities that extend beyond physical locations, or social groupings that evolve as people move, interact, and form new associations.

On the other hand, the term "Global" refers to communities that encompass a worldwide scope but may still have defined characteristics or boundaries based on certain demographics or interests. Local communities tend to be more geographically defined and are typically associated with specific towns, neighborhoods, or regions. The term "Ambiguous" suggests a lack of clarity, but it does not specifically emphasize the dynamic and variable characteristics of such communities in the same way that "Fluid" does. Therefore, "Fluid" effectively captures the essence of communities that resist strict boundaries.