- finite: Infinity is weird. It's very hard to make arguments that hold when infinite resources are in the picture. Finite also includes the time dimension. If you have infinite time and/or space, intrinsic meaning may be possible, but I really have no idea.

- physical: That there is no other plane of existence to progress towards, heaven or enlightenment or anything else similar to those.

- universe: Whatever it is that we inhabit - multiverse, universe, inside of a black hole, we're not quite sure yet as far as I understand the physics (which isn't very far at all unfortunately. It is fascinating though)

In your second clause i think perhaps you mean materialist[|ic] (or maybe physicalist) not physical. A soul, heaven, or other spiritual entities or spaces, aren't necessarily incompatible with a physical universe.

'tis a fair point, thanks.