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

alternatively \alter"natively\, adv.
   in the manner of alternatives, or that admits the choice of
   one out of two things.
   1913 webster

[2] : WordNet (r) 2.0

alternatively
     adv : in place of, or as an alternative to; "felix became a
           herpetologist instead"; "alternatively we could buy a
           used car" syn: as an alternative, instead, or
           else
see also:
as an alternative instead or else 

Alternatively >> A Words
Alternatively, definition of term: Alternatively
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