Bandwidth

The maximum rate at which data can be transferred across a network link, interface, or subsystem, typically expressed in bits per second; in some contexts it denotes the allocation or capacity reserved for traffic.

A measure of how far from the main diagonal the significant nonzero entries of a discretized linear operator (matrix) are concentrated, commonly quantified as the maximum distance |i-j| for which the matrix A(i,j) is nonzero (or the half-bandwidth in symmetric conventions).