vast

Very great in size, extent, or quantity. synonym: enormous.

Very great in scope or import.

An immense space.

Wide and vacant or unoccupied; waste; desolate; lonely.

Being of great extent or size; very spacious or large; enormous; massive; immense.

Very great in quantity, number, or amount.

Very great as to degree, intensity, difficulty of accomplishment, importance, etc.; mighty: used also in exaggerated colloquial speech, being much affected in the eighteenth century.

Synonyms Spacious.

3 and Colossal, gigantic, prodigious, tremendous, stupendous.

A boundless waste or space; immensity.