Nihilism?

Definitions of Nihilism:

A revolutionary doctrine that advocates destruction of the social system for its own sake
Nihilistic delusion: the delusion that things (or everything, including the self) do not exist; a sense that everything is unreal
Complete denial of all established authority and institutions

Which one is it boys and girls? Do you as an individual deny all institutions schools and authorities?
Do you believe no social system is key?
Or do you believe everything in consciousness is unreal? or all the above?
Or do you just not care?

Please excuse my discourse, I my sound like I'm trying to pick a fight or something, but I'm not, I'm just curious about all your opinions on the subject

My points of view on it are allot of ideals are ineffective to there own downfall, one of which and that which the ideals i agree the most but not entirely with are anarchism. Such a pretty idea in my opinion, but it seems like ideals should be backed up with effeciency otherwise they're just hopeful right? A dream.

(This is all just in theory of course, the above mentioned is only one of my theory's and points of view, "nothing is static, everything is falling apart")