CHANNEL

A path over which electrical signals can pass

Example: "A channel is typically what you rent from a telephone company"

A passage for water (or other fluids) to flow through

Example: "The fields were crossed with irrigation channels"

A long narrow furrow cut either by a natural process (such as erosion) or by a tool (as e.g. a groove in a phonograph record)

A deep and relatively narrow body of water (as in a river or a harbor or a strait linking two larger bodies) that allows the best passage for vessels

Example: "The ship went aground in the channel"

(often plural) a means of communication or access

Example: "It must go through official channels"

A bodily passage or tube lined with epithelial cells and conveying a secretion or other substance

Example: "The tear duct was obstructed"

A television station and its programs

Example: "A satellite tv channel"

A way of selling a company's product either directly or via distributors

Example: "Possible distribution channels are wholesalers or small retailers or retail chains or direct mailers or your own stores"