Source : Webster's Revised Unabridged Dictionary (1913)

Curator \Cu*ra"tor\ (k?-r?"t?r). n. [L., fr. curare to take care
   of, fr. cura care.]
   1. One who has the care and superintendence of anything, as
      of a museum; a custodian; a keeper.

   2. One appointed to act as guardian of the estate of a person
      not legally competent to manage it, or of an absentee; a
      trustee; a guardian.

Source : WordNet®

curator
     n : the custodian of a collection (as a museum or library) [syn:
          {conservator}]