Definition of probableness in English:

probableness

noun

rare
  • The quality or fact of being probable; probability, likelihood; plausibility.

Origin

Late Middle English; earliest use found in Reginald Pecock (c1392–?1459), bishop of Chichester and religious author. From probable + -ness.

Pronunciation

probableness

/ˈprɒbəblnəs/