democracy?

the French election results to me were not a "clear victory" for Sarkozy and defeat of Royal. He got 52% votes, while still leaving a 48% voters who voted AGAINST him. Statistically that is a significant number... but the principles of democracy makes you a winner even if it is by one vote. But, is that fair? Why the definition of democracy can't be changed to some CLEAR win, like a at least a difference of 20% between the leading opponents...