Source : Webster's Revised Unabridged Dictionary (1913)

Alternatively \Al*ter"na*tive*ly\, adv.
   In the manner of alternatives, or that admits the choice of
   one out of two things.

Source : WordNet®

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}]