'Extremely' definitions:

Definition of 'extremely'

From: WordNet
adverb
To a high degree or extent; favorably or with much respect; "highly successful"; "He spoke highly of her"; "does not think highly of his writing"; "extremely interesting" [syn: highly, extremely]
adverb
To an extreme degree; "extremely cold"; "extremely unpleasant" [syn: extremely, exceedingly, super, passing]

Definition of 'Extremely'

From: GCIDE
  • Extremely \Ex*treme"ly\, adv. In an extreme manner or state; in the utmost degree; to the utmost point; exceedingly; as, extremely hot or cold. [1913 Webster]