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(plm), n.[F. plomb, L. plumbum lead, a leaden ball or bullet; cf. Gr. mo°lybos, mo°libos, mo°lybdos. Cf. Plummet, Plunge.] 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. Plumb bob. See Bob, 4. Plumb joint, in sheet-metal work, a lap joint, fastened by solder. Plumb level. See under Level. Plumb line. (a) The cord by which a plumb bob is suspended; a plummet. (b) A line directed to the center of gravity of the earth. Plumb rule, a narrow board with a plumb line, used by builders and carpenters. Plumb a.Perpendicular; vertical; conforming the direction of a line attached to a plumb; as, the wall is plumb. Plumb adv.In a plumb direction; perpendicularly. "Plumb down he falls." Milton. Plumb v. t.[imp. & p. p.Plumbed (plmd); p. pr. & vb. n.Plumbing (plm"ng).] 1. To adjust by a plumb line; to cause to be perpendicular; as, to plumb a building or a wall. 2. 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. He did not attempt to plumb his intellect. Ld. Lytton. 3. To seal with lead; as, to plumb a drainpipe. 4. To supply, as a building, with a system of plumbing. スポンサード リンク
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