- the voluntary agreement among individuals by which, according to any of various theories, as of Hobbes, Locke, or Rousseau, organized society is brought into being and invested with the right to secure mutual protection and welfare or to regulate the relations among its members.
- an agreement for mutual benefit between an individual or group and the government or community as a whole.
- (in the theories of Locke, Hobbes, Rousseau, and others) an agreement, entered into by individuals, that results in the formation of the state or of organized society, the prime motive being the desire for protection, which entails the surrender of some or all personal liberties
