Vastness

Vast′ness

,

Noun.

The quality or state of being vast.

, n.

1.

Great extent; immensity; as the vastness of the ocean or of space.

2.

Immense bulk and extent; as the vastness of a mountain.

3.

Immense magnitude or amount; as the vastness of an army, or of the sums of money necessary to support it.

4.

Immense importance.

vastness ‎(countable and uncountable, plural vastnesses)

(uncountable) The quality of being vast.
- 1918, W. B. Maxwell, chapter 5, in The Mirror and the Lamp:
  He was thinking; but the glory of the song, the swell from the great organ, the clustered lights, […], the height and vastness of this noble fane, its antiquity and its strength—all these things seemed to have their part as causes of the thrilling emotion that accompanied his thoughts.
(countable) Something vast.

quality of being vast