////The phrase quoted by Josepp is not a definition. It's an example to show how the word can be used in a sentence////

I'll post the whole thing verbatim one more time. It is a definition. Nowhere is the term "pure democracy" being used in a sentence.

Main Entry:pure democracy
Function:noun
Date:1656

: democracy in which the power is exercised directly by the people rather than through representatives

This is distinct from the definition of "democracy":

Main Entry:de£moc£ra£cy
Pronunciation:di-*m*-kr*-s*
Function:noun
Inflected Form:plural -cies
Etymology:Middle French democratie, from Late Latin democratia, from Greek d*mokratia, from d*mos + -kratia -cracy
Date:1576

1 a : government by the people; especially   : rule of the majority b : a government in which the supreme power is vested in the people and exercised by them directly or indirectly through a system of representation usually involving periodically held free elections
2 : a political unit that has a democratic government
3 capitalized   : the principles and policies of the Democratic party in the United States *from emancipation Republicanism to New Deal Democracy — C. M. Roberts*
4 : the common people especially when constituting the source of political authority
5 : the absence of hereditary or arbitrary class distinctions or privileges

Now, really, do some homework instead of pulling something like that out of your ass.