Definition of plausibleness in US English:

plausibleness

noun

  • The quality of being plausible; plausibility.

Origin

Late 16th century; earliest use found in Richard Bernard (bap. 1568, d. 1641), Church of England clergyman and religious writer. From plausible + -ness.

Pronunciation

plausibleness

/ˈplɔːzɪblnəs/