Imagine a map not divided into neat, coloured patches, each with clear borders, governments, laws. (newscientist.com)
To be something definite, and not just a vague spewing forth of data, an information system requires clear borders. (religion-online.org)
Flesch found pygmy owls rarely took flight at heights lofty enough to clear border fences and avoided large gaps in vegetation, which are common near the barriers. (scientificamerican.com)