ne plus ultra

Noun

ne plus ultra (plural ne plus ultras)

1. The highest, ultimate point of achievement which can be reached; perfection.
   • Suppers were the ne plus ultra of human invention; it could go no further, and was obliged to degenerate; dinner is too much matter of business, it is a necessity: now, a necessity is too like a duty ever to be pleasant.1837, L[etitia] E[lizabeth] L[andon], “Success”, in Ethel Churchill: Or, The Two Brides. […], volume II, London: Henry Colburn, […], →OCLC, page 74
   • November 30, 2014, Julia Kavanagh, Rome: The ‘ne plus ultra’ of Arthttps://camel76.wordpress.com/2014/11/20/rome-the-ne-plus-ultra-of-art/
     It doesn’t get any better than this because Rome, like Florence, is the ne plus ultra of art.
2. The perfect or most extreme example of its kind; the ultimate.

   Synonyms:

   paragon, exemplar, last word

3. (rare) A prohibition against proceeding further; an insuperable obstacle or limiting condition.