vast
adj. B2 Upper Intermediate Oxford US //ˈvæst// UK //vˈɑːst// vast
adj. extremely large in size, amount, or area. You use it to describe something that feels almost endless, like the ocean or a big desert.
adj. of very great extent or quantity; immense. Often used to describe physical space or abstract concepts that exceed normal measurement.
The desert is a vast, empty place.
The internet contains a vast amount of information on almost every topic imaginable.
From the summit, the hikers looked out over a vast expanse of untouched forest that stretched toward the horizon in every direction.
Usage
Typically precedes the noun it modifies; frequently collocates with words like 'majority', 'expanse', or 'improvement'.