  There are several definitions of the notion of angular momentum in general
relativity. However non of them can be said to capture the physical notion of
intrinsic angular momentum of the sources in the presence of gravitational
radiation. We present a definition which is appropriate for the description of
intrinsic angular momentum in radiative spacetimes. This notion is required in
calculations involving radiation of angular momentum, as for example is
expected in binary coalescence of black holes.
