Definition of presupposal in US English:

presupposal

noun

rare
  • A supposition formed beforehand; a presupposition.

Origin

Late 16th century; earliest use found in John Bridges (?1536–1618), bishop of Oxford. From pre- + supposal, after presuppose.

Pronunciation

presupposal

/ˌpriːsəˈpəʊzl/