Deafness meaning

dĕf'nĭs
The lack or severe impairment of the ability to hear. Deafness is usually genetic or congenital as a result of prenatal viral infection, birth trauma, or other causes. Acquired deafness is caused mostly by drug toxicity, trauma, and certain diseases. Cochlear implants are used to treat some forms of deafness.
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The condition of being deaf; the lack or loss of the ability to hear.
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(figuratively) Lack of knowledge or refusal to admit a particular problem, issue, etc.

Their deafness to her cries.

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Origin of deafness

From deaf +"Ž -ness.