The Collaborative International Dictionary of English v.0.48:

Noncommissioned \Non`com*mis"sioned\, a.
   Not having a commission.
   [1913 Webster]

   Noncommissioned officer (Mil.), a subordinate officer not
      appointed by a commission from the chief executive or
      supreme authority of the State; but by the Secretary of
      War or by the commanding officer of the regiment.
      [1913 Webster]

WordNet (r) 3.0 (2006):

noncommissioned officer
    n 1: a military officer appointed from enlisted personnel [syn:
         noncommissioned officer, noncom, enlisted officer]