1. Exactly vertical
   "the tower of Pisa is far out of plumb"

1. Conforming to the direction of a plumb line
   "The wall was built plumb"
    
2. Completely; used as an intensifier
   "I'm plumb tuckered out";
   - clean [informal], plum
    
3. Exactly
   "fell plumb in the middle of the puddle";
   - plum

1. The metal bob of a plumb line
   "The carpenter used a plumb bob to ensure the wall was perfectly vertical";
   - plumb bob, plummet

1. Measure the depth of something
   "The scientists plumbed the ocean depths"
    
2. Examine thoroughly and in great depth
   "The researchers plumbed the depths of the ocean ecosystem"
    
3. Adjust with a plumb line so as to make vertical
   "The carpenter plumbed the wall to ensure it was perfectly straight"
    
4. Weight with lead
   "They plumbed the fishing net to ensure it sank properly"

Sounds like: pleural, plural

Derived forms: plumbs, plumbing, plumbed

See also: perpendicular, vertical

Type of: adjust, bob, burden, burthen, correct, explore, measure, quantify, quantitate, set, weight, weight down

Part of: perpendicular, plumb line

Encyclopedia: Plumb, Peter