Definition of natural reason in English:

natural reason

noun

  • 1The innate human faculty of reasoning.

  • 2Theology. Human reasoning or its conclusions, as distinguished from divine revelation.

Origin

Late Middle English; earliest use found in Exemplification Duke of Gloucester. From natural + reason.

Pronunciation

natural reason

/ˌnatʃ(ə)r(ə)l ˈriːzn//ˌnatʃ(ə)rəl ˈriːzn/