Definitions

1. adjective

no longer alive or in operation; having ceased to function or be effective

“The dead battery needed to be replaced.”

2. noun

a person or animal that is no longer alive

“The dead body was taken to the hospital for an autopsy.”

3. noun

a person or animal that is no longer working or in operation, especially a computer or machine

“The dead server was causing problems for the website.”

4. adverb

to death; to the point of death

“He died dead, with no hope of revival.”