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 of vastly

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

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

This will be an entirely different election with a vastly higher turnout and many more unaffiliated voters who don’t belong to any party. — Sun Sentinel Editorial Board, Sun Sentinel, 20 Aug. 2026

The tech offers a vastly safer and more sustainable solution for mass-producing grid-scale energy storage by replacing toxic, scarce metals and flammable solvents with non-toxic, eco-friendly materials. — Mrigakshi Dixit, Interesting Engineering, 20 Aug. 2026

The mezzo-soprano was already vastly experienced in singing at sporting events and had carved out a niche for herself as the go-to performer on the big cricketing occasion. — Paul Newman, New York Times, 19 Aug. 2026

Lakefront lot splits, which vastly increase a property’s value, are rare in Winter Park. — Brian Bell, The Orlando Sentinel, 19 Aug. 2026

Word History

First Known Use

1598, in the meaning defined above

Rhymes for vastly

• ghastly
• lastly
• steadfastly