Definition of "Deadness" :

noun: the inanimate property of something that has died

noun: the physical property of something that has lost its elasticity

"He objected to the deadness of the tennis balls."

noun: the quality of being unresponsive; not reacting; as a quality of people, it is marked by a failure to respond quickly or with emotion to people or events

"In an instant all the deadness and withdrawal were wiped away."