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guardrail

[gahrd-reyl] /ˈgɑrdˌreɪl/
noun
1.
Also, guardrailing. a protective railing, as along a road or stairway.
2.
Railroads. a rail laid parallel to a track to prevent derailment or to keep derailed rolling stock from leaving the roadbed.
Origin
1825-1835
1825-35; guard + rail1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for guard-rail

guardrail

/ˈɡɑːdˌreɪl/
noun
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 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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