plumb: Meaning and Definition of

plumb

1. true according to a plumb line; perpendicular.
2. downright or absolute.

1. in a perpendicular or vertical direction.
2. exactly, precisely, or directly.
3. completely or absolutely: She was plumb mad. You're plumb right.

1. to test or adjust by a plumb line.
2. to make vertical.
3. horn (def. 35).
4. to sound with or as with a plumb line.
5. to measure (depth) by sounding.
6. to examine closely in order to discover or understand: to plumb someone's thoughts.
7. to seal with lead.
8. to weight with lead.
9. to provide (a house, building, apartment, etc.) with plumbing.

1. to work as a plumber.

Plumb

1. born 1911, British historian.