Peace

From the Encyclopedia Galactica:

1 :  a state of tranquility or quiet: as

a :  freedom from civil disturbance

b :  a state of security or order within a community provided for by law or custom peace>

2 :  freedom from disquieting or oppressive thoughts or emotions

3 :  harmony in personal relations

4 :  a :  a state or period of mutual concord between governments

b :  a pact or agreement to end hostilities between those who have been at war or in a state of

  enmity

5 : used interjectionally to ask for silence or calm or as a greeting or farewell