'Caustically' definitions:

Definition of 'caustically'

From: WordNet
adverb
In a caustic vitriolic manner; "he addressed her caustically" [syn: caustically, vitriolically]

Definition of 'Caustically'

From: GCIDE
  • Caustically \Caus"tic*al*ly\, adv. In a caustic manner. [1913 Webster]