Definitions

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

  • adj. Impossible to know, especially being beyond the range of human experience or understanding: the unknowable mysteries of life.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Not knowable.
  • n. Something that cannot be known.

from The Century Dictionary and Cyclopedia

  • Incapable of being known; not capable of being ascertained or discovered; above or beyond knowledge.
  • Unknown.

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

  • adj. not knowable

Etymologies

From un- + know + -able. (Wiktionary)

Examples

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  • "I was infatuated with this simple declaration that, Yes, food comes from somewhere! It does not manifest itself, pre-sliced and wrapped in cellophane, in the fluorescence of a supermarket. This, I thought, is incredible! I felt so above the Americans, happily blind with their sterile processed foods of unknown and perhaps unknowable origins."
    - Rachel Slajda, 'Eye Contact'.

    February 18, 2009