noun

• One who works in or with lead.
• One who furnishes, fits, and repairs pipes and other apparatus for the conveyance of water, gas, or drainage.
• One who installs piping for potable and waste water.
• A person who investigates or prevents leaks of information.
• (Britain, informal) In the Royal Navy, an apprentice, a boy aged 16 to 18, who is trained in technical skills at the Dockyard Schools to become an artificer.
• (medicine, slang) A urologist.