The Collaborative International Dictionary of English v.0.48:

Manager \Man"a*ger\, n.
   1. One who manages; a conductor or director; as, the manager
      of a theater.
      [1913 Webster]

            A skillful manager of the rabble.     --South.
      [1913 Webster]

   2. A person who conducts business or household affairs with
      economy and frugality; a good economist.
      [1913 Webster]

            A prince of great aspiring thoughts; in the main, a
            manager of his treasure.              --Sir W.
                                                  Temple.
      [1913 Webster]

   3. A contriver; an intriguer. --Shak.
      [1913 Webster]

WordNet (r) 3.0 (2006):

manager
    n 1: someone who controls resources and expenditures [syn:
         director, manager, managing director]
    2: (sports) someone in charge of training an athlete or a team
       [syn: coach, manager, handler]