A tomb is a place where a dead person is buried. Usually, a tomb is under a tombstone, which says the name of the person who died and when they lived.
We're all going to die, and that means we're all going to end up in some type of tomb: a place where a corpse is buried. Over time, there have been many types of tombs, including the huge, ornate, elaborate tombs of the Egyptians. Other tombs are simpler, involving the simple burial of a box or the cremated remains.