Definition of unreligiosity in English:

unreligiosity

Pronunciation /(ˌ)ʌnrɪˌlɪdʒɪˈɒsɪti/

noun

rare
  • Unreligiousness; irreligiousness.

Origin

Late Middle English; earliest use found in The Wycliffite Bible (early version). From un- + religiosity, originally after post-classical Latin irreligiositas irreligiosity.