'Immensely' definitions:

Definition of 'immensely'

From: WordNet
adverb
To an exceedingly great extent or degree; "He had vastly overestimated his resources"; "was immensely more important to the project as a scientist than as an administrator" [syn: vastly, immensely]

Definition of 'Immensely'

From: GCIDE
  • Immensely \Im*mense"ly\, adv. In immense manner or degree. [1913 Webster]