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

• extremely
• incredibly
• very
• highly
• terribly
• too
• greatly
• severely
• badly
• so
• far
• damned
• wildly
• damn
• really
• desperately
• much
• heavily
• seriously
• intensely
• immensely
• most

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

Currently approximately one fourth of unemployed people fall into this category which does not include those who are actively seeking work yet are either not counted in unemployment figures or are vastly underemployed. —Amanda Miller Littlejohn, Forbes.com, 13 Aug. 2025

Australian media reflected the opposing views in vastly different front-page treatments. —Hilary Whiteman, CNN Money, 8 Aug. 2025

On Capitol Hill, Republicans and Democrats staked out vastly different positions on the Corporation for Public Broadcasting cuts. —Lawrence Andrea, jsonline.com, 6 Aug. 2025

More than half of year-to-date contract wins (51 percent) are coming from new activity, which is a vastly different makeup compared to 2024’s 29 percent. —Glenn Taylor, Sourcing Journal, 6 Aug. 2025

Word History

First Known Use

1598, in the meaning defined above

Rhymes for vastly

• ghastly
• lastly
• steadfastly