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

He will be remembered for rule changes that have vastly improved the pace of play, as well as for unifying the league's business arms through what is called One Baseball, but the cap system would be what history remembers most. — Maury Brown, Forbes.com, 8 July 2026

According to a 2024 report commissioned by the California Department of Cannabis Control, the amount of pot grown illegally continues to vastly outstrip legal production. — Andrew Graham, Sacbee.com, 8 July 2026

The fintech stock is down 57% this year, vastly underperforming the S & P 500 . — Assiatou Hann, CNBC, 7 July 2026

Peters was a singular figure, operating in vastly different times. — Allison Deangelis, STAT, 7 July 2026

Word History

First Known Use

1598, in the meaning defined above

Rhymes for vastly

• ghastly
• lastly
• steadfastly