Definition of impossibilism in English:

impossibilism

noun

  • [mass noun] Belief in ideas or policy, especially on social reform, that are held to be unrealizable or impractical.

    • ‘The most stratospheric flights of that speech exuded the utopian impossibilism which he attacked when practised by the self-indulgent Old Left.’

Pronunciation:

impossibilism

/ɪmˈpɒsɪbɪlɪz(ə)m/