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- Dictionaryplumb/plʌm/
verb
- 1. measure (the depth of a body of water): "I plumbed the depth and found the bottom of the shelf to be seven metres down"
- 2. test (an upright surface) to determine the vertical: "they are valuable aids in plumbing the frames and keeping the side of the ship fair"
noun
- 1. a ball of lead or other heavy object attached to the end of a line for finding the depth of water or determining the vertical on an upright surface.
adverb
- 1. exactly: informal "trading opportunities plumb in the centre of central Europe" Similar
- 2. vertically: archaic "drapery fell from their human forms plumb down" Similar
adjective
- 1. vertical: "ensure that the skirting is straight and plumb"
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