vastly

adverb

vast·​ly ˈvast-lē 

: to a very great or vast degree or extent : exceedingly

two people with vastly different tastes

a vastly more powerful bomb

But bluff and bravado … won against potential enemies who vastly outnumbered him.

—David Gilmour

It was the most eclectic—yet also vastly entertaining—evening of dance I have seen in a long time.

—Rita Felciano

Synonyms

• achingly
• almighty
• archly
• awful
• awfully
• badly
• beastly
• blisteringly
• bone
• colossally
• corking
• cracking
• damn
• damned
• dang
• deadly
• desperately
• eminently
• enormously
• especially
• ever
• exceedingly
• exceeding
• extra
• extremely
• fabulously
• fantastically
• far
• fiercely
• filthy
• frightfully
• full
• greatly
• heavily
• highly
• hugely
• immensely
• incredibly
• intensely
• jolly
• majorly
• mightily
• mighty
• monstrous [chiefly dialect]
• mortally
• most
• much
• particularly
• passing
• rattling
• real
• really
• right
• roaring
• roaringly
• seriously
• severely
• so
• sore
• sorely
• spanking
• specially
• stinking
• such
• super
• supremely
• surpassingly
• terribly
• that
• thumping
• too
• unco
• uncommonly
• very
• vitally
• way
• whacking
• wicked
• wildly

Examples of vastly in a Sentence

the team has vastly improved in the course of the season

vastly underestimated the cost of advertising the new product

Recent Examples on the Web

Women dominate the lower tiers of tea labor, from plucking to packaging and remain vastly underrepresented in management, ownership, or policy influence. —Dianne Plummer, Forbes.com, 21 May 2025

The drones would vastly exceed the 3,800 Argo robot sensors circulating in oceans worldwide, and drone experts say a revolution in battery technology would be needed. —Alec Luhn, Scientific American, 20 May 2025

This emotion manifested itself on college campuses in vastly different ways. —Rep. Steve Weir, Hartford Courant, 20 May 2025

And all three lost that role, admittedly for vastly different offenses that nonetheless had the same career-dinging effect. —Marco Della Cava, USA Today, 19 May 2025

Word History

First Known Use

1598, in the meaning defined above

Rhymes for vastly

• ghastly
• lastly
• steadfastly