[more vast; most vast] : very great in size, amount, or extent
▪ She has a vast amount of knowledge on this subject. ▪ vast quantities of information ▪ The policy is supported by the vast majority of citizens. ▪ a vast expanse of land
▪ She has a vast amount of knowledge on this subject. ▪ vast quantities of information ▪ The policy is supported by the vast majority of citizens. ▪ a vast expanse of land
— vast·ly adverb
▪ His background is vastly different from mine. ▪ They vastly increased spending.
▪ His background is vastly different from mine. ▪ They vastly increased spending.







