guardrail

[gahrd-reyl]

guard·rail

[gahrd-reyl]
noun
1.
Also, guard·rail·ing. 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:
1825–35; guard + rail1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Guardrail is always a great word to know.
So is slumgullion. Does it mean:
the offspring of a zebra and a donkey.
a stew of meat, vegetables, potatoes, etc.
Collins
World English Dictionary
guardrail (ˈɡɑːdˌreɪl)
 
n
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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