Source : Webster's Revised Unabridged Dictionary (1913)

Externally \Ex*ter"nal*ly\, adv.
   In an external manner; outwardly; on the outside; in
   appearance; visibly.

Source : WordNet®

externally
     adv 1: on or from the outside; "the candidate needs to be
            externally evaluated" [ant: {internally}]
     2: with respect to the outside; "outwardly, the figure is
        smooth" [syn: {outwardly}]