An inclosed passage way for establishing and directing a current of air, gases, etc.; an air passage
- A pipe, tube, or channel for conveying hot air, gas, steam, or smoke, as from a furnace or fireplace to a chimney.
- Music An organ pipe sounded by means of a current of air striking a lip in the side of the pipe and causing the air within to vibrate. Also called labial.
- Music The lipped opening in such a pipe.
- A fishing net.