Main entry: plumb, plumb bob, plummet
Definition: the metal bob of a plumb line
Main entry: plumb
Definition: adjust with a plumb line so as to make vertical
Main entry: plumb
Definition: examine thoroughly and in great depth
Main entry: plumb
Definition: measure the depth of something
Main entry: plumb
Definition: weight with lead
Main entry: plumb
Definition: exactly vertical
Usage: the tower of Pisa is far out of plumb
Main entry: plum, plumb, clean
Definition: completely; used as intensifiers
Usage: clean forgot the appointment; I'm plumb (or plum) tuckered out
Definition: exactly
Usage: fell plumb in the middle of the puddle
Main entry: plumb
Definition: conforming to the direction of a plumb line