Is death absence of life?why or why not?

The dead know nothing at all so yes there is no life. To live is to eat and drink and enjoy stuff. The dead don't need to eat or drink to sustain them.  

When someone dies there is nothing left. They are gone and won't return

yes

explanation:

the fighting words doctrine, in united states constitutional law, is a limitation to freedom of speech as protected by the first amendment to the united states constitution. in 1942, the u.s. supreme court established the doctrine by a 9–0 decision in chaplinsky v. new hampshire.