  We propose an entanglement tensor to compute the entanglement of a general
pure multipartite quantum state. We compare the ensuing tensor with the
concurrence for bipartite state and apply the tensor measure to some
interesting examples of entangled three-qubit and four-qubit states. It is
shown that in defining the degree of entanglement of a multi-partite state, one
needs to make assumptions about the willingness of the parties to cooperate. We
also discuss the degree of entanglement of the multi-qubit
$\ket{W_{M}}$-states.
