The civil society, from my understanding, is a society in which citizens have the necessary resources and effective constitutional protection to fully exert their civil rights and fulfill their civil duties. This includes, but not limited to, the formation of ‘sectors’ or organizations for the citizenship related functions.
Citizens don’t not necessarily need collective or collaborated activities to maintain and expand their citizenship. As long as there is a binding social contract between the citizen and the authority, and a impartial arbitrary system to settle the disputes between the two parties, that society can be called a civil society.
Some comparable terms to civil society are slavery society and medieval society, in which there were no citizens and citizenship.