Meaning of guardrail

guard•rail

Pronunciation: (gärd'rāl"), [key]
— n.
  1. a protective railing, as along a road or stairway.
  2. a rail laid parallel to a track to prevent derailment or to keep derailed rolling stock from leaving the roadbed.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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