Source : Webster's Revised Unabridged Dictionary (1913)

Guardianship \Guard"i*an*ship\, n.
   The office, duty, or care, of a guardian; protection; care;
   watch.

Source : WordNet®

guardianship
     n 1: attention and management implying responsibility for safety;
          "he is in the care of a bodyguard" [syn: {care}, {charge},
           {tutelage}]
     2: the responsibility of a guardian or keeper; "he left his car
        in my keeping" [syn: {keeping}, {safekeeping}]