Vast \Vast\, a. [Compar. Vaster; superl. Vastest.]

[L. vastus empty, waste, enormous, immense: cf. F. vaste. See Waste, and cf. Devastate.]

1. Waste; desert; desolate; lonely. [Obs.]

The empty, vast, and wandering air. --Shak.

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

Through the vast and boundless deep. --Milton.

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

4. Very great in importance; as, a subject of vast concern.

Syn: Enormous; huge; immense; mighty.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Vast \Vast\, n. A waste region; boundless space; immensity. ``The watery vast.'' --Pope.

Michael bid sound The archangel trumpet. Through the vast of heaven It sounded. --Milton.

Source: Webster's Revised Unabridged Dictionary (1913)