What is Deadener?
Deadener definition and meaning on Dictionary terms:
verb (used with object)
to make less sensitive, active, energetic, or forcible; weaken: to deaden sound; to deaden the senses; to deaden the force of a blow.
to lessen the velocity of; retard: to deaden the headway of a ship.
to make impervious to sound, as a floor.
verb (used without object)
to become dead.