given?

[Eway]

"The only given in this life is that we're gonna die - a freaky thought, but true."

What does "given" mean here?
Is it a noun?

[Marylin]

"The only given in this life is that we're gonna die - a freaky thought, but true."

What does "given" mean here?
Is it a noun?

It is a noun.
If you say "it's a given", it means it will happen for sure.

Here in your sentence, given means "the only thing to happen for sure in this life is the fact that we will die".

That and taxes.

[RonBee]

Damn taxes!