One old greek described democracy as two wolves and a sheep deciding on what to have for dinnner. Strictly speaking Britain is not a democracy, it is parliamentary representation. The people do not vote for their leader or government. Democracy is one of those words that have changed.
The dictionary definition is still the same but the way the word is used by politicians and others encompasses more than simply how a government is chosen. Concepts like the rule of law, rights of the people and government taking into account the interests of all people are important aspects of the modern usage of democracy.
Personally I am so sure that one man one vote is a good basis for government or decisions. You don't have democracy in the military or business and they seem to run far better than most governments. Come to think of it, is a bdsm relationship democratic with equal say.
Incidentally and off topic, isn't it strange that we seemed so obsessed with bring democracy to other countries when as we all know it is far from perfect. Isn't it ironic that many of those who claim the war brought democracy to Iraq regard Saudi Arabia with its absolute monarchy as a staunch ally for freedom. Perhaps every country should be free to work out for itself how it wants to be governed and there is no one shoe that fits all.