Any device or algorithm that selects a specific channel out of some input.

the English Channel

present participle of back-channel

simple past tense and past participle of back-channel

A group of islands of the Duchy of Normandy in the English Channel: Jersey, Guernsey, Alderney, Sark, Herm, Brecqhou, Lihou, Jethou and Burhou.

(rail transport) The man-made tunnel under the English Channel joining England and France.

(biochemistry) A protein complex or single protein which penetrates a cell membrane and catalyzes the passage of specific ions through that membrane.

The band used by one customer, among the given total frequency spectrum.

a television channel dedicated to news, often operating continuously

The arm of the Atlantic Ocean that separates the British Isles from northern France, and joins the North Sea to the Atlantic Ocean.