| 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. 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. | Obsolete. a worker in lead or similar metals. |
| 1. | a small mass of lead or other heavy material, as that suspended by a line and used to measure the depth of water or to ascertain a vertical line. Compare plumb line. |
| 2. | true according to a plumb line; perpendicular. |
| 3. | Informal. downright or absolute. |
| 4. | in a perpendicular or vertical direction. |
| 5. | exactly, precisely, or directly. |
| 6. | Informal. completely or absolutely: She was plumb mad. You're plumb right. |
| 7. | to test or adjust by a plumb line. |
| 8. | to make vertical. |
| 9. | Shipbuilding. horn (def. 31). |
| 10. | to sound with or as with a plumb line. |
| 11. | to measure (depth) by sounding. |
| 12. | to examine closely in order to discover or understand: to plumb someone's thoughts. |
| 13. | to seal with lead. |
| 14. | to weight with lead. |
| 15. | to provide (a house, building, apartment, etc.) with plumbing. |
| 16. | to work as a plumber. |
| 17. | out of or off plumb, not corresponding to the perpendicular; out of true. |

Plumber programming, tool
A system for obtaining information about memory leaks in Ada and C programs.
(http://home.earthlink.net/~owenomalley/plumber.html).
(17 Feb 1999)