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  1. Dictionary
    Plumb
    /pləm/

    verb

    • 1. measure (the depth of a body of water): "I plumbed the depth and found the bottom of the shelf to be seven meters 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 plumb bob.

    adverb

    adjective

    • 1. vertical: "ensure that the baseboard is straight and plumb"