channel
n.
A circuit or portion of a frequency spectrum set aside for carrying information.
A portion of a signal that carries information in parallel with other portions, which are assembled to make a whole.
A path of communication between people; for example, official channels, proper channels.
A trench, tube, or path directing the passage of materials.
Notes
Examples of channel1 include television and radio channels. - An example of channel2 is stereo, which uses a left and right channel that are combined to give a sense of acoustic space. - Microfilm jackets have channels4 to hold strips of microfilm.
