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

Although safety precautions for drivers have vastly improved since the heyday of Lorenzen and Waltrip, concussions and the prospect of CTE remain a constant fear within the sport. — Steve Henson, Los Angeles Times, 20 Oct. 2026

Trump has vastly expanded ICE to ramp up deportations of immigrants, refugees and asylum-seekers, and the agency was a major part of last year’s law-enforcement surge in the Chicago area known as Operation Midway Blitz. — Daniel C. Vock, Chicago Tribune, 18 Oct. 2026

By changing these layers, researchers hope to vastly improve the function of devices — particularly smaller, wearable, and biodegradable ones. — Prabhat Ranjan Mishra, Interesting Engineering, 17 Oct. 2026

The campaign to legalize marijuana raised and spent vastly more money. — Christopher Spata, Miami Herald, 17 Oct. 2026

Word History

First Known Use

1598, in the meaning defined above

Rhymes for vastly

• ghastly
• lastly
• steadfastly