'Principally' definitions:

Definition of 'principally'

From: WordNet
adverb
For the most part; "he is mainly interested in butterflies" [syn: chiefly, principally, primarily, mainly, in the main]

Definition of 'Principally'

From: GCIDE
  • Principally \Prin"ci*pal*ly\, adv. In a principal manner; primarily; above all; chiefly; mainly. [1913 Webster]