Meaning of BANDWIDTH in English
Bandwidth is how much data you can send through a network or modem connection. It is usually measured in bits-per-second. A good example of this is a highway with cars travelling on it. The highway is the connection and the cars are the data. The wider the highway the more cars can travel on it at one time. It's the same thing with computer data. Full-motion, full-screen video would require a bandwidth of roughly 10,000,000 bits-per-second.
English glossary of computer and Internet terms. Английский глоссарий компьютерных и Интернет терминов. 2012