[pluhm] 
| 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. |
