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1. The belief that things (or everything, including oneself) do not exist; denial of objective reality; a sense that everything is unreal
   - nihilistic delusion
    
2. Complete denial of all established authority and institutions
    
3. A revolutionary doctrine that advocates destruction of the social system for its own sake

Derived forms: nihilisms

Type of: anarchy, delusion, doctrine, ism, lawlessness, philosophical system, philosophy, psychotic belief, school of thought

Encyclopedia: Nihilism