  A generalised definition of the metric of quantum states is proposed by using
the techniques of differential geometry. The metric of quantum state space
derived earlier by Anandan, is reproduced and verified here by this generalised
definition. The metric of quantum states in the configuration space and its
possible geometrical framework is explored. Also, invariance of the metric of
quantum states under local gauge transformations, coordinate transformations,
and the relativistic transformations is discussed.
