What is the difference between non-living & dead

non living is one that does not have life
but dead means something that had life but now it does not

If you are being serious, the non-living are those that just go about their day to day life and forget to enjoy the important things.

If you are talking like Twilight, the non-living are creatures such as vampires that have no souls but still walk among us.

And in both cases dead is dead, no more life, breath or movement.

Non-living is something that has never lived. Inorganic

Dead is something that was living. Organic

What he said. As examples a stone is non-living. A plant that's withered or an animal that has ceased to live is dead.