guard rail


Also, guardrailing. a protective railing, as along a road or stairway.
Railroads. a rail laid parallel to a track to prevent derailment or to keep derailed rolling stock from leaving the roadbed.

1825–35; guard + rail1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
guardrail (ˈɡɑːdˌreɪl)
1.  a railing at the side of a staircase, road, etc, as a safety barrier
2.  railways Also called (Brit): checkrail a short metal rail fitted to the inside of the main rail to provide additional support in keeping a train's wheels on the track

Collins English Dictionary - Complete & Unabridged 10th Edition
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