guardrail Hear it!

guardrail definition

guard·rail (gärd′rāl′)

noun

  1. a railing that serves as a protective barrier, as on a staircase or alongside a highway
  2. ☆ an extra rail alongside the main rail of a railroad at a crossing, etc., as to keep the cars on the track

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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