柯林斯詞典guardrail /?ɡɑ?d?re?l/ (also guard rail) (guardrails) 1. N-COUNT A guardrail is a railing that is placed along the edge of something such as a staircase, path, or boat, so that people can hold onto it or so that they do not fall over the edge. 護(hù)欄 返回 guard rail劍橋詞典a bar along the edge of something steep , such as stairs or a cliff , to prevent people from falling off 護(hù)欄，扶欄 返回 guard rail