Pipes for conveying water, etc., collectively; a system or network of pipes or tubes.

Pipes collectively; piping as part of a structure.

A continuous line of joined pipes, esp. one used for conveying oil, gas, etc., long distances; a (usually flexible) tube for carrying fluid in…

Chiefly Australian, New Zealand, and South African. A network of pipes used for water supply and irrigation; distribution of water via such a…

(a) an arrangement of pipes (for steam, water, sewage, etc.) that forms a loop whose draw-off points are supplied by flow from two directions; (b)…

Extended uses. colloquial. A system of pipes, ducts, or (more generally) connections in an engine or other device.

Used of any network that serves a similar purpose for other services.