Definition of plumb line in English:

plumb line

noun

  • A line with a plumb attached to it, used for finding the depth of water or determining the vertical on an upright surface.

    • ‘We did scramble out on one permanent pond with a view to testing the depth with a plumb line which was probably quite dangerous but you don't think of that at that age.’
    • ‘Draw a plumb line on the wall representing one side of the cabinet.’
    • ‘It was here that Burlington kept his collection of architectural plans and the painting on the ceiling reflects this interest through the personification of the subject, surrounded by set squares and plumb lines.’
    • ‘They used iron chisels, saws, drills, and callipers, set squares and plumb lines.’
    • ‘There is a good chance that the corner is not plumb, so this process guarantees that you will be working from a plumb line.’
    • ‘When these two were aligned vertically, the pyramid builders might have hoisted a long plumb line and fixed it at the moment when the two stars both lay on the line. The point where the vertical line touched the ground would indicate north.’
    • ‘Using simple string plumb lines, the crew squares the first, 10-yard wide strip of ‘grass’ (green turf carpet) along the sidelines.’

Pronunciation:

plumb line

/ˈpləm ˌlīn/