A tube of metal, plastic, or other material used to convey water, gas, oil, or other fluid substances. A narrow tube made from wood, clay, etc., with a bowl at one end for containing burning tobacco, the smoke from which is drawn into the mouth. A wind instrument consisting of a single tube with holes along its length that are covered by the fingers to produce different notes. A command that causes the output from one routine to be the input for another. A cask for wine, especially as a measure equal to two hogsheads, usually equivalent to 105 gallons (about 477 liters). Convey (water, gas, oil, or other fluid substances) through a pipe or pipes. Play (a tune) on a pipe or pipes. Decorate (clothing or soft furnishings) with a thin cord covered in fabric.