'Functionally' definitions:

Definition of 'functionally'

(from WordNet)
adverb
With respect to function; "the two units are functionally interdependent"

Definition of 'Functionally'

From: GCIDE
  • Functionally \Func"tion*al*ly\, adv. In a functional manner; as regards normal or appropriate activity. [1913 Webster]
  • The organ is said to be functionally disordered. --Lawrence. [1913 Webster]