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deaf

[def] /dɛf/
adjective, deafer, deafest.
1.
partially or wholly lacking or deprived of the sense of hearing; unable to hear.
2.
refusing to listen, heed, or be persuaded; unreasonable or unyielding:
deaf to all advice.
3.
(initial capital letter) of or relating to the Deaf or their cultural community:
Deaf customs and values.
noun, (used with a plural verb)
4.
deaf persons collectively (usually preceded by the):
social services for the deaf.
5.
(initial capital letter) deaf persons who identify themselves as members of a community composed of deaf persons and others who share in their culture (usually preceded by the).
Origin
900
before 900; Middle English deef, Old English dēaf; cognate with Middle Low German dōf, Dutch doof, Old High German toub
Related forms
deafly, adverb
deafness, noun
half-deaf, adjective
nondeaf, adjective
nondeafly, adverb
nondeafness, noun
quasi-deaf, adjective
quasi-deafly, adverb
semideaf, adjective
semideafness, noun
undeaf, adjective
Usage note
See dumb.
Pronunciation note
Deaf is usually pronounced
[def] /dɛf/ (Show IPA)
with the vowel of left. In uneducated speech the dialectal pronunciation
[deef] /dif/
to rhyme with leaf, is still heard occasionally, but it is increasingly rare.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for deafness
  • The reason is because the merle gene is linked to blindness and deafness.
  • Some double dapples have problems with deafness and blindness.
  • deafness was not recognized by early breeders, so the breed was thought to be stupid.
British Dictionary definitions for deafness

deaf

/dɛf/
adjective
1.
  1. partially or totally unable to hear
  2. (as collective noun; preceded by the): the deaf See also tone-deaf
2.
refusing to heed: deaf to the cries of the hungry
Derived Forms
deafly, adverb
deafness, noun
Word Origin
Old English dēaf; related to Old Norse daufr
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for deafness
n.

late 14c., from deaf + -ness.

deaf

adj.

Old English deaf "deaf," also "empty, barren," specialized from Proto-Germanic *daubaz (cf. Old Saxon dof, Old Norse daufr, Old Frisian daf, Dutch doof "deaf," German taub, Gothic daufs "deaf, insensate"), from PIE dheubh-, which was used to form words meaning "confusion, stupefaction, dizziness" (cf. Greek typhlos "blind).

The word was pronounced to rhyme with reef until 18c. Deaf-mute is from 1837, after French sourd-muet. Deaf-mutes were sought after in 18c.-19c. Britain as fortune-tellers. Deaf as an adder (Old English) is from Psalms lviii:5.

Online Etymology Dictionary, © 2010 Douglas Harper
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deafness in Medicine

deafness deaf·ness (děf'nĭs)
n.
The lack or loss of the ability to hear.

deaf (děf)
adj.

  1. Partially or completely lacking in the sense of hearing.

  2. Deaf Of or relating to the Deaf or their culture.

n.
  1. Deaf people considered as a group.

  2. Deaf The community of deaf people who use American Sign Language as a primary means of communication.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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deafness in Science
deafness
  (děf'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.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Idioms and Phrases with deafness

deaf

In addition to the idiom beginning with
deaf
The American Heritage® Idioms Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Word Value for deafness

12
13
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