In its purest form, it would be the ability to pursue whatever one wishes to without interference from others - individuals or entities. However, that absolute has to be tempered by a "reasonable person standard" in a civilized society.
Should United Nation's troops be dispatched to Tibet to survey the possibility of discontent, suppression, and/or possible slaughter of its indigenous people, given the closing of its borders recently to foreigners?
If you deem this to be a political question, I apologize, and, in the alternative, I will ask what color of crayon is your favorite?