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