subway
nounUK /ˈsʌbweɪ/
US /ˈsʌbweɪ/
A subway is a train that runs under the ground in a city.
We took the subway to the museum because it was faster than the bus.
OTHER MEANINGS
2. An underground passage that lets people walk under a road.
Use the subway to cross the busy street safely.
3. A railway that runs mostly in tunnels beneath a city.
The city built a new subway line to connect the airport.
4. To travel by underground train.
She subways to work every morning.