from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The highest point, as of excellence or achievement; the ultimate.
- n. The most profound degree, as of a condition or quality.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. the highest, ultimate point of achievement which can be reached; perfection
- n. the highest possible state, degree, or condition of quality; nothing better
from the GNU version of the Collaborative International Dictionary of English
- The uttermost point to which one can go or attain; hence, the summit of achievement; the highest point or degree; the acme.
- A prohibition against proceeding further; an insuperable obstacle or limiting condition.
from The Century Dictionary and Cyclopedia
- Not (anything) more beyond; the extreme or utmost point; completeness; perfection.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the state of being without a flaw or defect
Latin nē plūs ultrā, (go) no more beyond (this point) : nē, no + plūs, more + ultrā, beyond.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin nē ("not") plūs ("more") ultrā ("beyond") (Wiktionary)
Those who thought about the matter at all took Owen's osteological extravaganzas for the ne plus ultra of morphological speculation.