The chief characteristic and distinguishing feature of a Democracy is: Rule by Omnipotent Majority.
In a Democracy, The Individual, and any group of Individuals composing any Minority, have no protection against the unlimited power of The Majority. It is a case of Majority-over-Man.
This is true whether it be a Direct Democracy, or a Representative Democracy.
A Republic, on the other hand, (ahem) has a very different purpose and an entirely different form, or system, of government. Its purpose is to control The Majority strictly, as well as all others among the people, primarily to protect The Individual’s God-given, unalienable rights and therefore for the protection of the rights of The Minority, of all minorities, and the liberties of people in general.
The definition of a Republic is: a constitutionally limited government of the representative type, created by a written Constitution--adopted by the people and changeable (from its original meaning) by them only by its amendment--with its powers divided between three separate Branches: Executive, Legislative and Judicial. Here the term "the people" means, of course, the electorate.
So. That said, I am losing faith in our Republic. Why is that? I'll tell you why. All of the numbskulls complaining about 'our representative democracy'...like it's some form of government we run or something....when they're getting precisly what they're asking for by misrepresenting 'our Republic.'