Synonyms

vastly

American

[vast-lee, vahst‐] / ˈvæst li, ˈvɑst‐ /

adverb

to an extremely great extent or degree; hugely.

We still have essentially the same brains as early humans, but most of us live in vastly different circumstances than they did.

Other Word Forms

supervastly adverb

Etymology

Origin of vastly

vast ( def. ) + -ly

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

It is vastly bigger than the home that Lorenze had been living in, a four-bedroom, 2.5-bathroom dwelling that she purchased via an LLC for $2.4 million in July 2024.

From MarketWatch • Apr. 8, 2026

Then in one moment seconds after half-time, Kane showed why England's hopes for World Cup success will be vastly reduced if he was missing.

From BBC • Apr. 7, 2026

Their upbringings may have been vastly different but the net result is not: they’re winners, as good as it gets at this.

From The Wall Street Journal • Apr. 5, 2026

It’s rare in the investment world to have two similar groups of securities trading at vastly different prices.

From Barron's • Apr. 3, 2026

The study concluded that the effect on Americans of radioactive emissions from nuclear tests was vastly outweighed by their exposure to diagnostic X-rays and other common sources.

From "Big Science" by Michael Hiltzik

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023