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

Fort Lauderdale United, South Florida’s only women’s professional soccer team, entered the 2025-26 season with 12 new players, a vastly different roster from the one that reached the USL Super League final in June. —Michelle Kaufman, Miami Herald, 9 Sep. 2025

Synergistic alignment involves braiding the strategies for adapting to single trend-factors into new, vastly superior bundles. —Jerry Cahn, Forbes.com, 9 Sep. 2025

Starmer could have rebutted this, pointing to the Conservatives’ vastly more numerous 121 seats. —Christian Edwards, CNN Money, 7 Sep. 2025

Recognition bottleneck Conventional industrial robots have difficulty handling objects that can look vastly different when lighting changes, they’re positioned differently, or when parts of them are hidden. —Tejasri Gururaj, Interesting Engineering, 4 Sep. 2025

Word History

First Known Use

1598, in the meaning defined above

Rhymes for vastly

• ghastly
• lastly
• steadfastly