/ Dictionary / Index P plumbing: Meaning and Definition of Find definitions for: plumb•ing Pronunciation: (plum'ing), [key] — n. the system of pipes and other apparatus for conveying water, liquid wastes, etc., as in a building. the work or trade of a plumber. act of a person who plumbs, as in ascertaining depth. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: plumbing (Thesaurus) plumbiferous plumbism Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language