Webster's Revised Unabridged Dictionary · 1913

Deafness

Deafness , noun

1.
Incapacity of perceiving sounds; the state of the organs which prevents the impression which constitute hearing; want of the sense of hearing.
2.
Unwillingness to hear; voluntary rejection of what is addressed to the understanding.
Collocations (1)
Nervous deafness , a variety of deafness dependent upon morbid change in some portion of the nervous system, especially the auditory nerve.