Broadband is a fast connection that carries a great deal of data. Broadband speed, fibre broadband, no broadband here.
The name is technical in origin: broad band means a wide range of frequencies, as against the narrow band a dial-up modem used. What counts as broadband keeps rising, and the regulator's definition has been raised repeatedly.
1nounbroadbandA fast connection that carries a great deal of data.
“We couldn't stream films at the cottage because it had no broadband.”
broadband is a connection.
Broad plus band, from a wide band of frequencies, as against narrowband.
From broad + band.
Etymology from Wiktionary, CC BY-SA