  Motivated by the Bekenstein Hawking formula and the area law behaviour of
entanglement entropy, we propose that in any UV finite theory of quantum
gravity with a smooth spacetime, the total entropy for a pure state in a
co-dimension one spatial region, to leading order, is given by $S={A\over 4
G_N}$, where $A$ is the area of the co-dimension two boundary. In the context
of $Dp$ brane holography we show that for some specially chosen regions bulk
entanglement can be mapped to ``target space" entanglement in the boundary
theory. Our conjecture then leads to a precise proposal for target space
entanglement in the boundary theory at strong coupling and large $N$. In
particular it leads to the conclusion that the target space entanglement would
scale like $O(N^2)$ which is quite plausible in a system with $O(N^2)$ degrees
of freedom. Recent numerical advances in studying the D0 brane system hold out
the hope that this proposal can be tested in a precise way in the future.
