The hollow bed of running waters; (also) the bed of the sea or other body of water. • The natural or man-made deeper course through a reef, bar, bay, or any shallow body of water. • The navigable part of a river. • A narrow body of water between two land masses. • Something through which another thing passes; a means of conveying or transmitting. • An ion channel: pore-forming proteins located in a cell membrane that allow specific ions to pass through. • A gutter; a groove, as in a fluted column. • A structural member with a cross section shaped like a squared-off letter C. • A connection between initiating and terminating nodes of a circuit. • The narrow conducting portion of a MOSFET transistor. • The part that connects a data source to a data sink. • A path for conveying electrical or electromagnetic signals, usually distinguished from other parallel paths. • A single path provided by a transmission medium via physical separation, such as by multipair cable. • A single path provided by a transmission medium via spectral or protocol separation, such as by frequency or time-division multiplexing. • A specific radio frequency or band of frequencies, usually in conjunction with a predetermined letter, number, or codeword, and allocated by international agreement. • A specific radio frequency or band of frequencies used for transmitting television. • The portion of a storage medium, such as a track or a band, that is accessible to a given reading or writing station or head. • The part of a turbine pump where the pressure is built up. • A distribution channel. • A particular area for conversations on an IRC or similar network, analogous to a chat room and often dedicated to a specific topic. • A means of delivering up-to-date Internet content via a push mechanism. • A psychic or medium who takes on the personality of a spirit and conveys messages from them.