Vastly vs. Fastly: What's the Difference?
"Vastly" means to a great extent or degree, often used to describe something immense, whereas "fastly" is a nonstandard term and generally incorrect; "fast" should be used instead.
Which is correct: Vastly or Fastly
How to spell Vastly?
Vastly is Correct
Fastly is Incorrect
ADVERTISEMENT
Vastly and Fastly Definitions
Vastly
Very great in size, extent, or quantity.
Vastly
Very great in scope or import
A vast improvement.
Vastly
An immense space.
Vastly
Greatly, in a vast manner.
Vastly
To a vast extent or degree; very greatly; immensely.
ADVERTISEMENT
Vastly
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
