vastly
adverb
to an exceedingly great extent or degree
“He had vastly overestimated his resources”
“was immensely more important to the project as a scientist than as an administrator”
Synonymsimmensely
Source: WordNet 3.1, Princeton University
Vastly meaning
What does “vastly” mean? Definitions, examples, synonyms and opposites.
“vastly” is an adverb with one meaning. Its most common meaning is: to an exceedingly great extent or degree.