D defs.my
Entry 3 senses Webster, 1913

Nihilism

/nī'-əl-ĭzˌ-əm/ · Ni·hil·ism · IPA /ˈnaɪ.əˌlɪz.m̩/
01 n. Nothingness; nihility.
  1. 1.
    Nothingness; nihility.
  2. 2.
    The doctrine that nothing can be known; scepticism as to all knowledge and all reality.
  3. 3.
    The theories and practices of the Nihilists.(Politics)