noun
metro; subway; underground railway
Commonly refers to urban underground rail systems, especially in European contexts. In Japan, 地下鉄 (ちかてつ) is more common for domestic subways, but メトロ is used in names like 東京メトロ.
from French métro
パリのメトロはとても便利だ。
The Paris Metro is very convenient.
東京メトロで銀座まで行きます。
I'll go to Ginza on the Tokyo Metro.