: 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 MiltonSynonyms
Adjective
- astronomical
- astronomic
- Brobdingnagian
- bumper
- colossal
- cosmic
- cosmical
- cyclopean
- elephantine
- enormous
- galactic
- gargantuan
- giant
- gigantesque
- gigantic
- grand
- herculean
- heroic
- heroical
- Himalayan
- huge
- humongous
- humungous
- immense
- jumbo
- king-size
- king-sized
- leviathan
- mammoth
- massive
- mega
- mighty
- monster
- monstrous
- monumental
- mountainous
- oceanic
- pharaonic
- planetary
- prodigious
- super
- super-duper
- supersize
- supersized
- titanic
- tremendous
- vasty
- walloping
- whacking
- whopping
Examples 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
Natalie Krebs, Outdoor Life, 31 Jan. 2025
But there was space for one new project to be unveiled, a documentary feature about the Grenfell Tower fire, the 2017 tragedy in which 72 people died that exposed government failure, greed and the U.K.’s vast wealth divide.
—Elsa Keslassy, Variety, 30 Jan. 2025
The startup founded in 2023 has said its AI models either match or outperform top U.S. rivals at a fraction of the cost, challenging the view that scaling AI requires vast computing power and investment.
—Aditya Soni and Zaheer Kachwala, USA TODAY, 30 Jan. 2025
If confirmed, Kennedy would be in charge of overseeing a vast federal agency that manages the health care of some 170 million Americans, regulates access to drugs and vaccines and tracks urgent outbreaks of diseases and foodborne illnesses.
—Will McDuffie, ABC News, 29 Jan. 2025
See all Example Sentences for vast 
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Adjective
That legislation, passed in 1980, acknowledges the unique management challenges of Alaska’s vast tracts of public lands and requires federal agencies to cooperate with state managers.
—Natalie Krebs, Outdoor Life, 31 Jan. 2025
But there was space for one new project to be unveiled, a documentary feature about the Grenfell Tower fire, the 2017 tragedy in which 72 people died that exposed government failure, greed and the U.K.’s vast wealth divide.
—Elsa Keslassy, Variety, 30 Jan. 2025
The startup founded in 2023 has said its AI models either match or outperform top U.S. rivals at a fraction of the cost, challenging the view that scaling AI requires vast computing power and investment.
—Aditya Soni and Zaheer Kachwala, USA TODAY, 30 Jan. 2025
If confirmed, Kennedy would be in charge of overseeing a vast federal agency that manages the health care of some 170 million Americans, regulates access to drugs and vaccines and tracks urgent outbreaks of diseases and foodborne illnesses.
—Will McDuffie, ABC News, 29 Jan. 2025
See all Example Sentences for vast
Dictionary Entries Near vast
Cite this Entry
“Vast.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/vast. Accessed 2 Feb. 2025.
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