Democracy is the self-ruling of the people.
Voting and majority decisions are an important aspect of that but far from enough to have true democracy. In order to really represent the entire population it is important to make sure that the minority is to a certain degree protected from the majority, i.e. that the majority can't simply decide to take away essential rights from a minority. It also requires a fundamental respect for a basic inalienable rights, an basic value of every human being that can't be taken from you. That is one reason why I think both the death penalty and not allowing prisoners or former fellons to vote is incompatible with true democracy.
There is a scene in Doctor Shivago where a landowner finds his house in the countryside locked down by revolutionaries with a sign saying "property of the people". "Well", he says, "I too am part of the people!" and he tears down the sign and breaks open the door. I always liked that scene.
In order to be able to coexist peacefully and practice this self-rule the population needs to be able to make informed decisions. That requires freedom of the press (to ensure access to information and different viewpoints) as well as high quality publically funded education (to be able to think critically and distinguish fact from bullshit, especially when bullshit is free and frequent).
Another requirement for a functioning democracy is trust in processes and institutions. Trust that the processes will help truth come to light, solutions and compromises to be found, etc. Trust both in a certain degree of continuity and predictability of the rules and institutions established and in the possibility to change them if necessary through peaceful processes.
All those are requirements for a true democracy deserving of that name.
I don't know whether to address you as Red or to address you as Herring, so I will content myself in answering the question, what is democracy?
We discovered that power tends to corrupt, and absolute power corrupts absolutely, so we limit power by liberal democracy.
The essence of liberal democracy is the limitation of power, this is counter intuitive as politicians want to increase their power, so there is a creative tension within liberal democracy between the wishes of the politicians and liberal democracy itself.
And of course we limit power by the Separation of Powers, so we limit power by posing power against power, naturally this leads to conflict, but not violence, and to discontent. We find this addressed in German in, "Civilisation and It's Discontent", by Dr Sigmund Freud, click
Civilization and Its Discontents - Wikipedia.
Winston Churchill remarked that democracy is the worst system of government, except for all the others.