Origin: Greek suffix -ism
Nihilism has 5 different meanings across 2 categories:
a revolutionary doctrine that advocates destruction of the social system for its own sake
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
The view that all endeavours are devoid of objective meaning.
A movement of the 1860s that rejected all authority and promoted the use of violence for political change.