What Does Reign Mean?

It means that there is world peace in every one but check the dictionary for it because people might be wrong to it so i think its peace or it could be someone being  a slave to someone else

Reign is referred to as a person who serves as a monarch or pope. This time period is not certain. In terms of a king rein it last till the king or monarch lives or until he wishes to step down. It mostly referred to with the abbreviation 'r', after a crowned heads name, like George VI, King of the Dominion of Canada (r. 1936–1952). Some of the reigns are can be taken in as an example are Queen Victoria of the United Kingdom reigned from 1837 to 1901, King Victor Emmanuel III of Italy reigned from 1900 to 1946 and Pope John XXIII reigned from 1958 to 1963.

A period of reign generally ends in tree ways death, abdication or even abolition of the office.