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.
I went sightseeing in Paris by riding the metro.
東京メトロで銀座まで行きます。
I'll go to Ginza on the Tokyo Metro.
メトロでルーブル美術館に行った。
I went to the Louvre by metro.
I'll get off the metro at the next station.
metronome
metropolis
metrosexual
Borrowed from French 'métro', short for 'chemin de fer métropolitain' (metropolitan railway).