Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A group or set of nine.

from The Century Dictionary.

  • noun The number nine; a system of nine objects; especially, in mathematics, a system of nine points common to different plane cubic curves, or a system of nine lines common to cubic curves.
  • noun One of the divisions of Porphyry's collection of the doctrines of Plotinus: so named from the fact that each of the six divisions contains nine books.

from the GNU version of the Collaborative International Dictionary of English.

  • noun The number nine or a group of nine.
  • noun the title given to the works of the philosopher Plotinus, published by his pupil Porphyry; -- so called because each of the six books into which it is divided contains nine chapters.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun The number nine.
  • noun Any system or grouping containing nine objects.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun the cardinal number that is the sum of eight and one

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[Greek enneas, ennead-, from ennea, nine; see newn̥ in Indo-European roots.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

From Greek enneas which means from nine.

Examples

Comments

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  • At softball we played plenty bad

    So heed my sad jeremiad:

    Though students of lit

    May prosper at wit

    They're bad at forming an ennead.

    May 1, 2017