: very great in size, amount, degree, intensity, or especially in extent or range
vast knowledge
a vast expanse
: a boundless space
the vast of heaven—
John Milton
John MiltonExamples of vast in a Sentence
Adjective
She has a vast amount of knowledge on this subject.
The policy is supported by the vast majority of citizens.
a vast expanse of land
Recent Examples on the Web
Lance Eliot, Forbes.com, 15 July 2025
In the United States, childhood vaccine coverage has been declining, and the vast majority of measles cases this year – more than 90% – have been in people who were unvaccinated or whose vaccination status was unknown, according to the US Centers for Disease Control and Prevention.
—Jacqueline Howard, CNN Money, 15 July 2025
Instead of allowing senior citizens and disabled first-responders choose the plan that was right for them — and the vast majority have chosen traditional Medicare — de Blasio forced every one of them into an inferior Medicare Advantage plan run by a for-profit insurance company.
—Marianne Pizzitola, New York Daily News, 14 July 2025
My experience has been in consumer and retail businesses where the breadth of responsibility is vast, and the ability to have a meaningful impact is significant.
—Eileen Falkenberg-Hull, MSNBC Newsweek, 14 July 2025
See All Example Sentences for vast
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Adjective
First, keep in mind that AGI and ASI will have been data trained by the vast stores of human writing.
—Lance Eliot, Forbes.com, 15 July 2025
In the United States, childhood vaccine coverage has been declining, and the vast majority of measles cases this year – more than 90% – have been in people who were unvaccinated or whose vaccination status was unknown, according to the US Centers for Disease Control and Prevention.
—Jacqueline Howard, CNN Money, 15 July 2025
Instead of allowing senior citizens and disabled first-responders choose the plan that was right for them — and the vast majority have chosen traditional Medicare — de Blasio forced every one of them into an inferior Medicare Advantage plan run by a for-profit insurance company.
—Marianne Pizzitola, New York Daily News, 14 July 2025
My experience has been in consumer and retail businesses where the breadth of responsibility is vast, and the ability to have a meaningful impact is significant.
—Eileen Falkenberg-Hull, MSNBC Newsweek, 14 July 2025
See All Example Sentences for vast
Cite this Entry
“Vast.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/vast. Accessed 21 Jul. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share