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

The two candidates running for the job have vastly different visions for how that system will work. — Caleb Groves, AJC.com, 6 Oct. 2026

Kingsolver’s fans appreciate her ability to play at vastly different scales. — Los Angeles Times, 5 Oct. 2026

In late September, other sources told royal insider Rob Shuter that Harry and Meghan’s relationship has actually vastly improved since returning to the UK. — Allison Degrushe, StyleCaster, 5 Oct. 2026

Flora has collected contributions from unions, corporations including Walmart, Chevron and Uber, and major trade organizations and vastly eclipses the financial contributions that his challenger has received. — Stephen Hobbs, Sacbee.com, 4 Oct. 2026

Word History

First Known Use

1598, in the meaning defined above

Rhymes for vastly

• ghastly
• lastly
• steadfastly