adv. immensely, greatly, hugely, enormously, considerably, substantially, (almost) entirely, infinitely, exceedingly, extremely, very much, Colloq worlds Their new house was vastly different from the way I had pictured it Katy looks vastly better since she lost two stone.
VASTLY
Meaning of VASTLY in English
Oxford thesaurus English vocab. Английский словарь Оксфорд тезаурус. 2012