'Nihilism' definitions:

Definition of 'nihilism'

From: WordNet
noun
A revolutionary doctrine that advocates destruction of the social system for its own sake
noun
The delusion that things (or everything, including the self) do not exist; a sense that everything is unreal [syn: nihilistic delusion, nihilism]
noun
Complete denial of all established authority and institutions

Definition of 'Nihilism'

From: GCIDE
  • Nihilism \Ni"hil*ism\, n. [L. nihil nothing: cf. F. nihilisme. See Annihilate.]
  • 1. Nothingness; nihility. [1913 Webster]
  • 2. The doctrine that nothing can be known; scepticism as to all knowledge and all reality. [1913 Webster]
  • 3. (Politics) The theories and practices of the Nihilists. [1913 Webster]

Synonyms of 'nihilism'

From: Moby Thesaurus