[1] : The Collaborative International Dictionary of English v.0.48

initially \ini"tially\, adv.
   in an initial or incipient manner or degree; at the
   beginning. --barrow.
   1913 webster

[2] : WordNet (r) 2.0

initially
     adv : at the beginning; "at first he didn't notice anything
           strange" syn: ab initio, at first, at the start
see also:
ab initio at first at the start 

[3] : Moby Thesaurus II by Grady Ward, 1.0

19 moby thesaurus words for "initially":
   ab initio, ab ovo, aborigine, at first, at the start,
   before everything, chiefly, first, first and foremost, first thing,
   firstly, from the beginning, in the beginning, mainly, originally,
   primarily, primitively, primo, principally

Initially >> I Words
Initially, definition of term: Initially
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