|Origin:||vastus 'empty, desolate, very large'|
vast S2 W2
extremely large [= huge]
vast amounts/numbers/quantities/sums etc (of something)
The government will have to borrow vast amounts of money.
The refugees come across the border in vast numbers.
vast areas/expanses/tracts etc (of something)
vast areas of rainforest
In the past five years, there has been a vast improvement in graduation rates.
used when you want to emphasize that something is true about almost all of a group of people or things:
The vast majority of books on the subject are complete rubbish.
—vastness noun [uncountable]