1825, "underground passage" (for water pipes or pedestrians, later for electrical wires), from sub- + way (n.). The sense of "underground railway in a city" is first recorded 1892, in reference to London.
例文
1. The majority of us feel worried if we walk through a subway .
多くの人は地下道を歩くときに恐怖を感じています。
2.A 15-year-old girl was attacked at knifepoint in a subway .
地下鉄でナイフを持った15歳の女の子が襲われた。
3.Steps lead down to the subway from the upstream side.