Wordnet 3.0
ADVERB (2)
1. 
 in a mechanical manner; 
 by a mechanism; 
- Example: "this door opens mechanically"[syn: mechanically, automatically]
2.  in a machinelike manner;  without feeling; 
- Example: "he smiled mechanically"
The Collaborative International Dictionary of English v.0.48:
Mechanically \Me*chan"ic*al*ly\, adv.
   In a mechanical manner.
   [1913 Webster]
WordNet (r) 3.0 (2006):
mechanically
    adv 1: in a mechanical manner; by a mechanism; "this door opens
           mechanically" [syn: mechanically, automatically]
    2: in a machinelike manner; without feeling; "he smiled
       mechanically"