subway · noun C /ˈsʌb.weɪ/Full view
Nouns: causeway, freeway, highway, subway, thruway, way
Adjectives: halfway, one-way, out-of-the-way, two-way
Adverbs: halfway, midway, one-way
subway (TRAIN)
A1 a system of trains that travel underground
Dictionary example:

We can take the subway to Grand Central Station.

Learner example:

The conference will take place at the Palace Hotel which can be reached by subway, taxi and bus. (First Certificate in English; B2; Thai)

Cambridge logo