superl waste; desert; desolate; lonely.
2. vast ·noun a waste region; boundless space; immensity.
3. vast ·superl very great in importance; as, a subject of vast concern.
4. vast ·superl very great in numbers, quantity, or amount; as, a vast army; a vast sum of money.
5. 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.