someone who is no longer alive
"I wonder what the dead person would have done"
A dead person.
"The deceased was found in his car outside the theater."
No longer alive; dead.
"The elderly man was found deceased in his home last night."
The word deceased comes from the verb "decease," which entered English through Middle English and Old French. It ultimately traces back to the Latin phrase dēcessus, meaning a departure or going away.