sub·way 
/ˈsʌbˌweɪ/ noun
plural sub·ways /ˈsʌbˌweɪ/ noun [count] 1 chiefly US : a system of underground trains in a city
▪ I took/rode the subway to midtown. ▪ No one on the subway seemed to mind how crowded it was. ▪ I've been on both the New York subway and the Underground in London. — often used before another noun ▪ a subway car/station ▪ the subway platform 2 Brit : a road or passage for walking under a road, set of railroad tracks, etc. : underpass
▪ I took/rode the subway to midtown. ▪ No one on the subway seemed to mind how crowded it was. ▪ I've been on both the New York subway and the Underground in London. — often used before another noun ▪ a subway car/station ▪ the subway platform
