1- An absence of anything, empty, zero.
2- Without kinship and without social bond at the same time.
The absence of something. Its actually something, since the absence of something must be something. Nothing is something, or we wouldn't be able to define it. It is truly just a word we made up to help us understand our world, since we say theres nothing in space, yet theres something there, but almost nothing. You can never do nothing, even in death.
Bill: Liam, what are you doing?
*Liam is sitting on the couch staring into space*
Liam: Nothing.
Bill: No, your breathing, your thinking, your aging, etc.
IT'S IMPOSSIBLE TO DO NOTHING, EVEN WHEN DEAD, YOUR DECAYING!!!