part of speech: adjective
inflections: vaster, vastest
definition 1: immense in size or area.
They drove past vast fields of corn.
synonyms: extensive, great, immense, tremendous
similar words: colossal, enormous, expansive, huge, humongous, large, massive, monstrous, oceanic, prodigious, spacious, wide
definition 2: very large in number or amount.
A vast number of people watched the ceremony on television.
synonyms: great, large, tremendous
similar words: enormous, extensive, huge, prodigious
definition 3: very great in intensity or degree; extensive.
She has a vast knowledge of literature.
synonyms: extensive, great
similar words: boundless, enormous, limitless, mighty, prodigious, spacious, tremendous, wide
related words: ample, big, broad, capacious, cavernous, deep, endless, gargantuan, global, immeasurable, immense, infinite, mammoth, monster
derivations: vastly (adv.), vastness (n.)