Plumb (redirected from plumbness)

plumb [pləm]

(engineering)

Pertaining to an object or structure in true vertical position as determined by a plumb bob.

---

plumb

Exactly vertical.

---

Plumb 

a device for centering a theodolite above marked points in the instrument leveling head or for elevating points when measuring the lengths of lines and angles. Plumbs include the plumb bob, a conical weight suspended on a string; the rigid plumb, a telescoping rod with a point at the end mounted perpendicularly to a level; and the optical plumb, a field glass whose collimator is also mounted perpendicularly to a level. Plumbs are also used in building construction, excavation work, and elsewhere.