Definition of soul substance in US English:

soul substance

noun

  • 1The substance of which a soul is made.

  • 2(Cultural Anthropology) an immaterial substance believed to form the ‘spirit’ or ‘self’ of a person (in some cultures also of an animal or object) and which is independent of the material body and outlives it.

Origin

Mid 17th century; earliest use found in John Sparrow (1615–1670), translator and lawyer.