channel iron (or bar)

noun

1. the bed of a running stream, river, etc.
2. the deeper part of a river, harbor, etc.
3. a body of water joining two larger bodies of water
4. a tubelike passage for liquids
5. 1. any means of passage
   2. a course through which something moves or is transmitted, conveyed, expressed, etc.
6. the proper or official course of transmission of communications: to make a request through army channels
7. a long groove or furrow
8. a rolled metal bar whose section is shaped thus ⊔
   also channel iron (or bar)
9. a narrow band of frequencies within which a radio or television transmitting station must keep its signal to prevent interference with other transmitters
10. any path that conducts an electronic signal between two points; specif., a pathway by which data is transmitted between two computers, a mainframe and a terminal, or a computer and a peripheral

transitive verb channeled or channelled, channeling or channelling

1. to make a channel or channels in
2. to flute (a pillar, column, etc.)
3. to send through a channel
4. in spiritualism, to serve as a medium for (a spirit)