Meaning & Definition
adverb
To a very great extent; considerably.
The landscape changed vastly after the storm.
In a manner that is immense or extensive.
Her understanding of the subject has grown vastly over the years.
To a large degree.
The team's performance vastly improved after the new coach was hired.
To a degree that is significantly larger or higher than what was previously noted.
The cost of living has increased vastly in the past decade.
Much more; far more.
The new smartphone is vastly superior to its predecessor.
Etymology
From 'vast' + '-ly', with 'vast' deriving from Latin 'vastus'.
Common Phrases and Expressions
vastly outnumbered:
To be significantly fewer in number compared to something or someone.
vastly different:
To show significant differences between two or more things.
vastly improved:
Indicating a considerable enhancement or betterment.
Slang Meanings
A lot
There were vastly more people at the concert than I anticipated.
Way more
He is vastly better at basketball than his teammates.