·superl Waste; desert; desolate; lonely.
II. Vast ·noun A waste region; boundless space; immensity.
III. Vast ·superl Very great in importance; as, a subject of vast concern.
IV. Vast ·superl Very great in numbers, quantity, or amount; as, a vast army; a vast sum of money.
V. 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.