I studied about Borneo from 1980 to 1995, earning a Ph.D. with a dissertation on Borneo, and have never heard it called that. But if you consider that Australia is a continent, it has 7.7 M km2. Greenland is the biggest island in the world. Again, I've never heard that called a mini-continent. It is 2.2 M km2 in size. read more
We could've defined Greenland as a continent, too, instead of calling it an island, but the point is, a line had to be drawn, and most geographers have drawn that line between Greenland and Australia, making the former the largest island, and the latter the smallest continent. read more