noun

• (biochemistry) An ion channel: pore-forming proteins located in a cell membrane that allow specific ions to pass through.
• (construction, mechanical engineering) A structural member with a cross section shaped like a squared-off letter C.
  "The channel is not very efficient as a beam or column when used alone, but built-up members may be constructed of channels assembled together with other structural shapes and connected by rivets or welds."
• (electronics) A connection between initiating and terminating nodes of a circuit.
  "The guard-rail provided the channel between the downed wire and the tree."
• (electronics) The narrow conducting portion of a MOSFET transistor.

verb

• (transitive) To make or cut a channel or groove in.
• (transitive) To direct or guide along a desired course.
  "We will channel the traffic to the left with these cones."
• (transitive, of a spirit, as of a dead person) To serve as a medium for.
  "She was channeling the spirit of her late husband, Seth."
• (transitive) To follow as a model, especially in a performance.
  "He was trying to channel President Reagan, but the audience wasn't buying it."

noun

• (nautical) The wale of a sailing ship which projects beyond the gunwale and to which the shrouds attach via the chains. One of the flat ledges of heavy plank bolted edgewise to the outside of a vessel, to increase the spread of the shrouds and carry them clear of the bulwarks.

name

• (Europe) Ellipsis of English Channel: a strait in Europe, separating Great Britain from France and connecting the North Sea to the Atlantic Ocean.