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

In his first season in Seattle, Sam Darnold vastly outplayed his contract while delivering a dream season and completing one of the most admirable comebacks stories in NFL history. —Jeff Howe, New York Times, 6 Mar. 2026

But the study projects the true total is vastly larger. —Hanna Wickes, Miami Herald, 6 Mar. 2026

Casualty reports have vastly conflicted. —Suzan Fraser and Munir Ahmed The Associated Press, Arkansas Online, 5 Mar. 2026

But the two most recent games, including the regional final in which Pollack scored only six points against Carmel, have been vastly different in that regard. —Steve Reaven, Chicago Tribune, 5 Mar. 2026

Word History

First Known Use

1598, in the meaning defined above

Rhymes for vastly

• ghastly
• lastly
• steadfastly