guard‧rail /ˈɡɑːd-reɪl $ ˈɡɑːrd-/ noun [countable]

1. a bar that is intended to prevent people from falling from a bridge, cliff etc

2. American English a bar that is intended to prevent cars from going off the road in an accident Synonym : crash barrier British English

[TahlilGaran] Dictionary of Contemporary English ▲