Source : Webster's Revised Unabridged Dictionary (1913)

Mechanically \Me*chan"ic*al*ly\, adv.
   In a mechanical manner.

Source : WordNet®

mechanically
     adv 1: in a mechanical manner; by a mechanism; "this door opens
            mechanically" [syn: {automatically}]
     2: in a machine-like manner; without feeling; "he smiled
        mechanically"