plumber

UK: /ˈplʌmə^r/ US: /ˈplʌmɚ/ ,(plum′ər)

WordReference Random House Learner's Dictionary of American English © 2025

plumb•er /ˈplʌmɚ/   n. [countable]

1. one who installs and repairs plumbing.

WordReference Random House Unabridged Dictionary of American English © 2025

plumb•er  (plum′ər), n. 

1. a person who installs and repairs piping, fixtures, appliances, and appurtenances in connection with the water supply, drainage systems, etc., both in and out of buildings.
2. Slang Terms an undercover operative or spy hired to detect or stop leaks of news or secret information, often using questionable or illegal methods, as illegal entry or wiretapping.
3. [Obs.] a worker in lead or similar metals.

• Latin, as above. See plumb, -er²
• Anglo-French; Old French plummier
• 1375–1425; 1965–70 for def. 2; late Middle English, spelling, spelled variant of Middle English plowber Late Latin plumbārius leadworker; replacing Middle English plummer

Collins Concise English Dictionary © HarperCollins Publishers::

plumber / ˈplʌmə/ noun

1. a person who installs and repairs pipes, fixtures, etc, for water, drainage, and gas

Etymology: 14th Century: from Old French plommier worker in lead, from Late Latin plumbārius, from Latin plumbum lead