American English

Definition of vast adjective from the Oxford Advanced American Dictionary



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  1. 1  extremely large in area, size, amount, etc. synonym huge
  2. 2 a vast area of forest a vast crowd a vast amount of information At dusk bats appear in vast numbers. His business empire was vast. In the vast majority of cases, this should not be a problem. Your help made a vast difference. Renting the hall was a vast expense.
noun [uncountable, countable] the vastness of space
See the Oxford Advanced Learner's Dictionary entry: vast