Definify.com
Webster 1913 Edition
Deafen
1.
To make deaf; to deprive of the power of hearing; to render incapable of perceiving sounds distinctly.
Deafened
and stunned with their promiscuous cries. Addison.
2.
(Arch.)
To render impervious to sound, as a partition or floor, by filling the space within with mortar, by lining with paper, etc.
Webster 1828 Edition
Deafen
DE'AFEN
,Verb.
T.