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

Players also found the flight of the ball was vastly different than in regular stadiums, where tall concrete bleachers knock down the wind. — Dan Hayes, New York Times, 14 Aug. 2026

Adjusted for inflation, each of these men commands vastly greater resources than Rosenwald ever did. — Harold Pollack, Chicago Tribune, 14 Aug. 2026

So swimming, a life-enhancing, healthy activity, indoors and especially outdoors in nature, has been vastly curtailed. — Voice Of The People, New York Daily News, 13 Aug. 2026

Lakefront lot splits — which vastly increase a property’s value — are rare in Winter Park. — Brian Bell, The Orlando Sentinel, 13 Aug. 2026

Word History

First Known Use

1598, in the meaning defined above

Rhymes for vastly

• ghastly
• lastly
• steadfastly