1. A weight on the end of a line, used to determine water depth.
2. A weight on the end of a line, used especially by masons and carpenters to establish a true vertical.
3. in a vertical or perpendicular line.
4. informal directly; squarely: fell plumb in the middle of the puddle.
5. informal utterly; completely: plumb worn out. see note at right.
6. exactly vertical. see synonyms at vertical.
7. informal utter; absolute; sheer: a plumb fool.
8. to determine the depth of with a plumb; sound.
9. to test the verticality or alignment of with a plumb.
10. to straighten or make perpendicular: plumb up the wall.
11. to examine closely or deeply; probe: "shallow ideas are plumbed and discarded” ( gilbert Highet).
12. to seal with lead.
13. to work as a plumber.
14. out of not vertical.

1. truly vertical
2. describing an LBW where the batsman is hit on the pads directly in front of his wicket and should be given out.
3. in a vertical direction.
4. squarely, directly; completely.
5. A little mass of lead, or the like, attached to a line, and used by builders, etc., to indicate a vertical direction.
6. A weight on the end of a long line, used by sailors to determine the depth of water.
7. to determine the depth, generally of a liquid; to sound.
8. to attach to a water supply and drain.
9. to think about or explore in depth, to get to the bottom of, especially to plumb the depths of.
10. to use a plumb bob as a measuring or aligning tool.
11. to accurately align vertically or horizontally.
12. to seal something with lead.
13. to work as a plumber.
14. to fall or sink like a plummet.
15. to trace a road or track; to follow it to its end.
16. to position vertically above or below.

1. perpendicular; vertical; conforming the direction of a line attached to a plumb.
2. in a plumb direction; perpendicularly.
3. 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. to adjust by a plumb line; to cause to be perpendicular.
5. 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. to seal with lead.
7. to supply, as a building, with a system of plumbing.

1. an obsolete spelling of plum.
2. true according to a plumb-line; vertical.
3. of persons, upright in character or conduct; thoroughgoing.
4. in a vertical direction; in a line perpendicular to the plane of the horizon; straight down.
5. exactly; to a nicety; completely: as, he hit the target plumb in the bull's-eye.
6. downright; entirely; altogether.
7. to adjust by a plumb-line; set in a vertical position: as, to plumb a wall or a building.
8. to sound with or as with a plummet, as the depth of water.
9. to ascertain the measure, dimensions, capacity, or the like, of; test-
10. to supply, as a building, with lead pipes for water, sewage, etc.
11. in plumbing, to seal an opening by closing it with solder or other soft metal.
12. to coincide in direction with the plumb-line; be vertically above or below.
13. A mass of lead attached to a line, used to test the perpendicularity of walls, etc.; a plummet.
14. the position of a plumb or plummet when freely suspended; the vertical or perpendicular.

1. weight with lead
2. exactly
3. measure the depth of something
4. conforming to the direction of a plumb line
5. exactly vertical
6. examine thoroughly and in great depth
7. the metal bob of a plumb line
8. completely; used as intensifiers
9. adjust with a plumb line so as to make vertical