The Collaborative International Dictionary of English v.0.48:

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.
   [1913 Webster]

WordNet (r) 3.0 (2006):

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

Moby Thesaurus II by Grady Ward, 1.0:

114 Moby Thesaurus words for "self-determination":
   Communist threat, Declaration of Independence, Western imperialism,
   absolute monarchy, aristocracy, atrocity story, autarchy, autarky,
   autocracy, automatic control, automation, automatism,
   automatization, autonomousness, autonomy, banner, battle hymn,
   bloody shirt, coalition government, colonialism, colors,
   commonwealth, constitutional government, constitutional monarchy,
   crostarie, democracy, dictatorship, dominion rule, duarchy,
   duumvirate, dyarchy, expansionism, face, federal government,
   federation, feudal system, fiery cross, free will, garrison state,
   gerontocracy, gonfalon, gratuitousness, heteronomy, hierarchy,
   hierocracy, home rule, imperialist threat, independence,
   individualism, inner-direction, internationalism, internationality,
   limited monarchy, manifest destiny, martial law, martial music,
   meritocracy, militarism, military government, mob rule, mobocracy,
   monarchy, national anthem, nationalism, nationality, nationhood,
   neocolonialism, ochlocracy, oligarchy, pantisocracy, patriarchate,
   patriarchy, peoplehood, police state, pure democracy, regency,
   representative democracy, representative government, republic,
   rugged individualism, self-action, self-activity, self-containment,
   self-direction, self-government, self-motion, self-propulsion,
   self-regulation, self-reliance, self-sufficiency, social democracy,
   sovereign nationhood, sovereignty, spontaneity, spontaneousness,
   statehood, stratocracy, technocracy, thearchy, theocracy,
   totalitarian government, totalitarian regime, triarchy,
   triumvirate, tyranny, unforcedness, voluntariness, voluntarism,
   voluntaryism, volunteer, volunteering, war song, welfare state,
   yellow peril