When we speak about life we usually mean life as a continuation-process, where there happens an identification.
When we say life, we often mean I and my house, I and my wife, I and my bank account, I and the experiences I have collected.
To live is therefore a process whereby something is continued in memory, conscious as unconscious, with the multifold struggles of the process, all the quarrels, episodes, experiences.
It is all this we call life.
Opposite is standing death, which means, that all this is being brought to an end.
Therefore, we create an opposition, life and death. Life is the known, the perspective we have created on the background of the images of time. Death is the unknown, the landscape that can't be mapped.