1. (n.)plumb a small mass of lead or other heavy material, as that suspended by a line and used to measure the depth of water or to ascertain a vertical line.
1. (adj)plumb bob, plumb, plummet the metal bob of a plumb line
2. (verb)plumb exactly vertical "the tower of Pisa is far out of plumb"
3. (verb)plumb measure the depth of something
4. (verb)plumb weight with lead
5. (verb)plumb examine thoroughly and in great depth
6. (adverb)plumb adjust with a plumb line so as to make vertical
7. (adverb)clean, plumb, plum completely; used as intensifiers "clean forgot the appointment"; "I'm plumb (or plum) tuckered out"
8. (adverb)plumb conforming to the direction of a plumb line
9. (adverb)plumb, plum exactly "fell plumb in the middle of the puddle"
Definition of 'Plumb'
Webster Dictionary
1. (adj)Plumb perpendicular; vertical; conforming the direction of a line attached to a plumb; as, the wall is plumb
2. (adverb)Plumb in a plumb direction; perpendicularly
3. (noun)Plumb a little mass or weight of lead, or the like, attached to a line, and used by builders, etc., to indicate a vertical direction; a plummet; a plumb bob. See Plumb line, below
4. (verb)Plumb to adjust by a plumb line; to cause to be perpendicular; as, to plumb a building or a wall
5. (verb)Plumb to sound with a plumb or plummet, as the depth of water; hence, to examine by test; to ascertain the depth, quality, dimension, etc.; to sound; to fathom; to test
6. (verb)Plumb to seal with lead; as, to plumb a drainpipe
7. (verb)Plumb to supply, as a building, with a system of plumbing
Definitions of Plumb 
