Wordnet 3.0
NOUN (1)
1. 
 a French caretaker of apartments or a hotel; 
 lives on the premises and oversees people entering and leaving and handles mail and acts as janitor or porter; 
The Collaborative International Dictionary of English v.0.48:
Concierge \Con`cierge"\, n. [F.]
   One who keeps the entrance to an edifice, public or private;
   a doorkeeper; a janitor, male or female.
   [1913 Webster]
WordNet (r) 3.0 (2006):
concierge
    n 1: a French caretaker of apartments or a hotel; lives on the
         premises and oversees people entering and leaving and
         handles mail and acts as janitor or porter