utility consisting of the pipes and fixtures for the distribution of water or gas in a building and for the disposal of sewage
"The renovation project focused entirely on updating the old plumbing to ensure safe water distribution and proper sewage disposal throughout the house."
measuring the depths of the oceans
"The expedition's primary goal was plumbing the depths of the Pacific Ocean to map new trenches."
The pipes, together with the joints, tanks, stopcocks, taps and other fixtures of a water, gas or sewage system in a house or other building.
"The plumber spent all day fixing the old plumbing to ensure the house had running water again."
In plain English: Plumbing is the system of pipes and fixtures that carries water into your home and drains waste away from it.
"The plumber fixed our leaking pipes during the plumbing repair."
Usage: Use this word to refer specifically to the physical network of pipes and fixtures that supply water or remove waste from a building. It is often confused with "plumber," which describes the person who installs and repairs these systems rather than the equipment itself.