vastly Definition

vast
adj

1. Extremely great in size, extent or amount.

Thesaurus: large, enormous, huge, expansive, extensive, ample, widespread, comprehensive; infinite, boundless, eternal; Antonym: limited, narrow, confined.
2. colloq
Considerable; appreciable.
Example: a vast difference

noun

1. literary
An immense tract; a boundless or empty expanse of space or time.

Derivative: vastly
adverb

Derivative: vastness
noun

The state or quality of being vast
Thesaurus: expanse, extent, enormity, hugeness, greatness, reach.

Etymology: 16c: from Latin vastus desolate or huge; compare waste.