the state or fact of being ignorant; lack of knowledge, learning, information, etc.

1175–1225; Middle English < Latin ignōrantia. See ignore, -ance

self-ignorance, noun
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World English Dictionary
ignorance (ˈɪɡnərəns)
lack of knowledge, information, or education; the state of being ignorant

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

early 13c., from Fr. ignorance (12c.), from L. ignorantia (see ignorant).
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
The festival lasts five days and celebrates the victory of good over evil,
  light over darkness, and knowledge over ignorance.
Every error is an error of substance, a betrayal of ignorance and inexperience,
  the academic equivalent of the double dribble.
Before communism, they never had that choice due to the rampant ignorance and
  lack of education.
The combination of her stubbornness and our ignorance make for a funny scene.
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