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

Streetcar ridership had already been on the rise this year, vastly outpacing total passenger rides of previous years. — Dylan Lysen, Kansas City Star, 1 July 2026

Quinones and Alvarado provided vastly different but equivalent threats out wide. — Jack Lang, New York Times, 1 July 2026

At the same the inner foldable screen provides a vastly superior viewing experience because of its wider tablet-like aspect ratio, which is better for watching widescreen videos. — Janhoi McGregor, Forbes.com, 30 June 2026

Oswaks recounted moments from the event in his interview with the outlet, noting how the pro-Palestinian protesters vastly outnumbered them that day. — Anders Hagstrom, FOXNews.com, 2 July 2026

Word History

First Known Use

1598, in the meaning defined above

Rhymes for vastly

• ghastly
• lastly
• steadfastly