1.   Altogether, it was a vast area whose different parts were cut off from each other except by slow coastal navigation.

2.   As Gould rightly assumed, vast areas of terraincognita held enormous possibilities for new and exotic species.

3.   Cutting down vast areas of the rainforests has created serious ecological problems.

4.   Even a full house would be piffling for a town with so vast a drawing area.

5.   In effect the law has encroached upon vast areas of activity.

6.   It irrigated the vast areas of his knowledge, humours and concerns.

7.   Natural resources were scattered over vast areas.

8.   The King held dominion over a vast area.

9.   The North, on the other hand, would have to stretch its supply lines over vast areas of hostile territory.