LATIN DICTIONARYLexicon Latīnum
phrase

semel prō semper

semel prō semper
Classical[ˈsɛ.mɛɫ ˈproː ˈsɛm.pɛr]Ecclesiastical[ˈsɛː.mel ˈprɔː ˈsɛm.per]

Meaning

  1. idiomaticonce and for all

Origins

From semel (“once”) + prō (“for”) + semper (“always”).

Quick answers

What does semel prō semper mean in Latin?
semel prō semper, a phrase, means “once and for all”.
How do you pronounce semel prō semper?
In classical Latin, [ˈsɛ.mɛɫ ˈproː ˈsɛm.pɛr]; in ecclesiastical (church) Latin, [ˈsɛː.mel ˈprɔː ˈsɛm.per].