Death is the end of life due to organic inability to support the homeostatic process. It's the end of the organism that was created from the birth.
The concept of death, however, has evolved over the history. Formerly, it was considered that death, as an event, took place at the moment when the heart stopped beating and the living being ceased to breathe. Because of advances in science, death came to a process which, at a given moment, becomes irreversible.
At the present time, if a person ceases to breathe on its own, it has the possibility to have access to a ventilator and a more or less normal life. In addition, there is mention brain death, which is total and irreversible brain activity, i.e., the person is still alive but his brain no longer works.
In addition to biology, there is a social and religious design compared to death that she would be the separation of the body and the soul. In other words, death is the end of physical life but not the existence. The belief in reincarnation is also fairly common.
A covered skeleton of a species of tunic with a sickle symbolizes death. Parque (a goddess) known as Morta represents death. According to Greek mythology and Roman, she cut the wire for measuring the duration of the life of every mortal.
Finally, death is the destruction or the end of something: "the death of the Argentina squad took place from the moment where Diego Maradona retired sports".