divider

noun
  1. A person or thing that separates or divides something into parts. noun
    The divider in the office helps maintain privacy between workspaces.
    She used a divider to organize the sections in her notebook.
  2. A device consisting of two arms linked by a hinge, used for measuring distances or drawing circles; also known as a pair of compasses. noun
    The architect used a divider to measure the distance on the blueprint.
    In geometry class, we learned how to use a divider to draw perfect circles.
  3. A line or band that separates two lanes of traffic on a road. noun
    The highway divider prevented cars from crossing into oncoming traffic.
    The city installed a new concrete divider to enhance road safety.