vastly

1 to a great degree the team has vastly improved in the course of the season Synonyms achingly, almighty, archly, awful, awfully, badly, beastly, blisteringly, bone, colossally, corking, cracking, damn, damned, dang, deadly, desperately, eminently, enormously, especially, ever, exceedingly (also exceeding), extra, extremely, fabulously, fantastically, far, fiercely, filthy, frightfully, full, greatly, heavily, highly, hugely, immensely, incredibly, intensely, jolly, majorly, mightily, mighty, monstrous [chiefly dialect], mortally, most, much, particularly, passing, rattling, real, really, right, roaring, roaringly, seriously, severely, so, sore, sorely, spanking, specially, stinking, such, super, supremely, surpassingly, terribly, that, thumping, too, unco, uncommonly, very, vitally, way, whacking, wicked, wildlyRelated Words absolutely, altogether, completely, downright, entirely, flat-out, fully, positively, purely, radically, thoroughly, totally, utterly, wholly; deeply, profoundly; exceptionally, notably, remarkably; considerably, extensively, significantly, substantially; appreciably, discernibly, markedly, noticeably, obviously, palpably, plainly, visibly; abundantly, plentifully; astronomically, grandly, monstrously, monumentally; excessively, obscenely, overmuch; amazingly, astonishingly, staggeringlyNear Antonyms meagerly, scantily; barely, hardly, just, marginally, minimally, scarcelyAntonyms little, negligibly, nominally, slightly, somewhat

2 to a large extent or degree vastly underestimated the cost of advertising the new product Synonyms astronomically, big-time, broadly, colossally, considerably, enormously, extensively, highly, hugely, largely, massively, monstrously, monumentally, much, sizably, staggeringly, stupendously, tremendously, utterly, greatlyRelated Words appreciably, noticeably, significantly; abundantly, amply, copiously, healthily, plentifullyNear Antonyms modestly; fractionally; imperceptibly, infinitesimally, insignificantly, invisibly, microscopically, minutely; barely, hardly, just, minimally, scarcelyAntonyms little, negligibly, nominally, slightly