- vastly as a adverb:
- 1
vastly
adverb
1 vastly
To an exceedingly great extent or degree:
— He had vastly overestimated his resources.
synonym: immensely.
Moby thesaurus: abroad, almost entirely, broadly, colossally, considerably, enormously, exceedingly, extensively, extremely, far and near, far and wide, gigantically, greatly, hugely, immensely, infinitely, on all sides, on every side, prodigiously, right and left ... show more.
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