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

Monthly energy costs nationwide surged from $196 to $265—a 35 percent increase from March 2022 to June 2025, vastly outpacing overall inflation during that time. —Daniel Orton, MSNBC Newsweek, 17 Nov. 2025

Shooting in Nevada, the film follows two fathers (Lowe and David) from vastly different worlds who form an unlikely bond while searching for a runaway daughter in Reno. —Matt Grobar, Deadline, 14 Nov. 2025

Burry warned that profits at the likes of Oracle and Meta may be vastly overstated. —Michael Considine,arjun Kharpal, CNBC, 14 Nov. 2025

Back when the merger took place, planet Earth was a vastly different place. —Big Think, 13 Nov. 2025

Word History

First Known Use

1598, in the meaning defined above

Rhymes for vastly

• ghastly
• lastly
• steadfastly