the subwayAmerican EnglishAmE the railway system that runs under the ground below a big city. British people use the underground when talking about the railway system in London, and many systems outside the US
the New York subway
We got on the next subway train.
the undergroundBritish EnglishBrE the railway system that runs under the ground below a big city
the London underground
an underground map
It’s quickest to travel by underground.
the tubeBritish EnglishBrE informal the railway system that runs under London
We took the tube to Trafalgar Square.
a crowded tube train
the metro used especially to talk about the railway system that runs under Paris. Also used about some other city’s systems, for example Moscow, Washington DC and Newcastle
1 (NAmE) underground train system地下鐵路➡ see also undergroundADJECTIVE | VERB + SUBWAY | SUBWAY + NOUN | PREPOSITIONADJECTIVE➤crowded擁擠的地鐵VERB + SUBWAY➤ride, take, use坐地鐵；乘地鐵➤get on, hop on上地鐵；跳上地鐵➤get off下地鐵SUBWAY + NOUN➤car, train地鐵列車➤platform, tunnel地鐵站台／隧道➤station, stop地鐵站➤line, system地鐵線路／系統➤token地鐵代用幣➤map地鐵地圖➤ride乘地鐵◇Yankee Stadium is a 40-minute subway ride from our house. 從我家到揚基體育場乘地鐵要 40 分鐘。➤rider地鐵乘客◇During the blackout, subway riders were stranded and unable to get home. 斷電期間，地鐵乘客被困不能回家。PREPOSITION➤in the subway在地鐵裏◇rush hour in the subway 地鐵高峰時間➤on the subway在地鐵上◇I've never been on the subway. 我從來沒坐過地鐵。subway
2 (BrE) path under a road地下通道ADJECTIVE | PREPOSITIONADJECTIVE➤pedestrian地下人行道PREPOSITION➤along a/the subway, in a/the subway, through a/the subway沿着地下通道；在地下通道中；穿過地下通道◇He ran through the pedestrian subway. 他跑過地下人行道。