Vast superl. : Waste; desert; desolate; lonely.

Vast superl. : Of great extent; very spacious or large; also, huge in bulk; immense; enormous; as, the vast ocean; vast mountains; the vast empire of Russia.

Vast superl. : Very great in numbers, quantity, or amount; as, a vast army; a vast sum of money.

Vast superl. : Very great in importance; as, a subject of vast concern.

Vast n. : A waste region; boundless space; immensity.

Example:
Why are there Vast emissions of carbon dioxide from vulcanos?

Taxonomy
Bodystyles, Search, free classifieds listings, Vacation Rentals, Real Estate, marketplace, Publishers, Chevrolet, Ford, Toyota, Honda, Dodge, Nissan, BMW, Volkswagen, Pontiac, Mercedes, Chrysler.

Defination from the web:
Tracks thousands of sites offering cars for sale, available jobs, and personal profiles from all over the Internet.