look up any word, like ethered:

1 definition by Dom Howells

In electronics and signalling terms it is the difference between the highest frequency component in a signal and the lowest frequency component. So called because it is the same as the width when viewed in the frequency domain or as a fourier transform.

In computing it is the throughput (transmission rate) in bits per second of a connection.
My internet connection has a bandwidth of 256Kbps.
by Dom Howells October 04, 2003