LATIN DICTIONARYLexicon Latīnum
adverb

plēnē

plēnē (comparative plēnius, superlative plēnissimē)
Classical[ˈpɫeː.neː]Ecclesiastical[ˈplɛː.ne]

Meaning

  1. fully; completely

In the readers how our graded readers gloss it

fully
plēnē — in Seneca, ch. VII

plēnē, adv., v. plenus
I. fin.

Quick answers

What does plēnē mean in Latin?
plēnē, a adverb, means “fully; completely”.
How do you pronounce plēnē?
In classical Latin, [ˈpɫeː.neː]; in ecclesiastical (church) Latin, [ˈplɛː.ne].