Definition of drastically in US English:

drastically

adverb

1In a way that is likely to have a strong or far-reaching effect.
‘now her fortunes have changed drastically’
‘management layers will be drastically reduced’
- ‘At the same time, the traditional industries of fishing and lobstering declined drastically as marine wildlife disappeared from the harbor.’
- ‘Its net income, however, improved drastically, from a loss of $11 million in 2002 to a net gain of $5.2 in 2003.’
- ‘The score is drastically cut and rearranged, leaving a first act of sixty minutes and a second of thirty five.’
- ‘Disney has a long history of drastically altering source material when developing animated projects.’
- ‘By the end of 1999 its economy had shrunk by 7 per cent and the unemployment ratio had increased drastically.’
- ‘If he does this, I have no doubt that it will drastically improve my opinion of the direction, editing, and story.’
- ‘Poverty and isolation drastically affected Hannah's already eccentric personality.’
- ‘The number of films being made - particularly entertainment films - dropped drastically.’
- ‘The segments vary drastically in quality.’
- ‘I think that the administration drastically underestimated the popular resistance to our invasion.’
1. 1.1as submodifier Extremely; very.
  ‘the ending was drastically different from what I'd expected’
  ‘It didn't take a master brewer to see that something was drastically wrong.’
  ‘His underlying view is that if we don't make a drastically new start we are doomed.’
  ‘At 129 minutes, the film's too long, but not drastically long.’
  ‘More than 100,000 drastically overweight people are expected to undergo bariatric surgery this year.’
  ‘When her husband's year-end settlement was given to him, Mary Smith realized that the amount was drastically insufficient.’
  ‘it is drastically important to my family to try and maintain as much open space as we can.’
  ‘It tastes good, but makes you feel drastically fat.’
  ‘There's something drastically impressive about that record label.’
  ‘It was drastically unfair to all concerned.’
  ‘Nothing drastically original there, but there is a neat twist: there are two different endings to the game.’