Source : Webster's Revised Unabridged Dictionary (1913)

Self-determination \Self`-de*ter`mi*na"tion\, n.
   Determination by one's self; or, determination of one's acts
   or states without the necessitating force of motives; --
   applied to the voluntary or activity.

Source : WordNet®

self-determination
     n 1: government of a country by its own people [syn: {self-government},
           {self-rule}]
     2: determination of one's own fate or course of action without
        compulsion