Freedom

Sevaral definitions of freedom are possible because freedom has various forms.

According to me, the best one and the more complete is this one :

Freedom is the possibility of acting, of thinking, of expressing oneself according to its own choices.In fact, freedom  is the absence of constraint. 

source: © Larousse 1996

picture extracted from: http://www.ecolesansracisme.be/Cours/esclavage/conditions.htm