I think the correct definition is: "When you have enough to survive and you make as much money as people you compare yourself with". That's why back in the days of socialism in Eastern Europe most of the people were quite content with being relatively poor, as long as they had the sense of social security and everyone else around them was as poor as them. On the other hand, nowadays many freelancers from poorer countries (me included), who are making a lot of money compared to their compatriots, are still not really happy as they don't make as much as their colleagues on the West. As long as you know you could be doing better you'll not be happy about the present situation... and soc. media is not helping with this...