'Instinctively' definitions:

Definition of 'instinctively'

From: WordNet
adverb
As a matter of instinct; "he instinctively grabbed the knife"

Definition of 'Instinctively'

From: GCIDE
  • Instinctively \In*stinc"tive*ly\, adv. In an instinctive manner; by force of instinct; by natural impulse. [1913 Webster]