channel
noun
ˈtʃænl 
ˈtʃænl on television/radio
1 [countable] a television stationWhat's on Channel 4 tonight?a movie/sports channelto change/switch channels2 [countable] a band of radio waves used for broadcasting television or radio programmesterrestrial/satellite channelsfor communicating
3 [countable] also channels [plural] a method or system that people use to get information, to communicate, or to send something somewhereComplaints must be made through the proper channels.The newsletter is a useful channel of communication between teacher and students.The company has worldwide distribution channels.Steps are being taken to implement a ceasefire through diplomatic channels.for ideas/feelings
4 [countable] a way of expressing ideas and feelingsThe campaign provided a channel for protest against the war.Music is a great channel for releasing your emotions.water
5 [countable] a passage that water can flow along, especially in the ground, on the bottom of a river, etcdrainage channels in the rice fields6 [countable] a deep passage of water in a river or near the coast that can be used as route for ships7 [countable] a passage of water that connects two areas of water, especially two seasthe Bristol Channel8 the Channel [singular] the area of sea between England and France, also known as the English Channelthe Channel Tunnelcross-Channel ferriesnews from across the Channel (= from France)
Usage note: TelevisionWatchingwatch television/TV/a show/(British English) a programme/(North American English) a program/a documentary/a pilot/a rerun/a repeatsee (especially British English) an ad/(especially North American English) a commercial/the news/the weathercatch/miss a show/a programme/a program/an episode/the newspick up/reach for/grab the remote (control)change/switch channelsurf (through)/(especially North American English) flip through/(especially British English) flick through the channelssit in front of/switch on/switch off/turn on/turn off the television/the TV/the TV sethave/install satellite (TV)/cable (TV)/a satellite dishShowingshow a programme/a documentary/an ad/a commercialscreen a programme/a documentaryrun an ad/a commercialbroadcast/(especially North American English) air/repeat a show/a programme/a documentary/an episode/a seriesgo out/air/be recorded liveattract/draw (in)/pull (in) viewersbe a hit with viewers/audiences/criticsget (low/high) ratingsAppearingbe on/appear on television/TV/a TV showtake part in a phone-in/a game show/a quiz show/a reality TV showhost a show/a programme/series/a game show/a quiz show/a talk show/(British English) a chat showbe/become/work as a (British English) TV presenter/talk-show host/sports commentator/anchorman/(British English) newsreaderread/present the newsappear/perform live (on TV)Programme-makingdo/film/make a show/a programme/a documentary/an episode/a pilot/a series/an ad/a commercialwork on a soap (opera)/a pilot (episode)/a sitcomwrite/produce a drama/sitcom/spin-off/comedy series