Plumb line Meaning, Definition & Usage

  1. noun a cord from which a metal weight is suspended pointing directly to the earth's center of gravity; used to determine the vertical from a given point
    perpendicular.

WordNet


Definitions
  1. . (a) The cord by which a plumb bob is suspended; a plummet . (b) A line directed to the center of gravity of the earth.

Webster 1913