Definition of profluency in US English:

profluency

noun

rare
  • Fluency of speech or writing; eloquence.

Origin

Late 17th century; earliest use found in John Owen (1616–1683), theologian and Independent minister. From classical Latin prōfluentia fluency (of speech); compare -ency.

Pronunciation

profluency

/ˈprəʊflʊənsi/