メトロmetoro

1. nounmetro; subway; underground railway

• Synonym地下鉄ちかてつNeutralThe everyday word for the subway and the most common choice; 「メトロ」 tends to appear in line and company names such as 「東京メトロ」.
• SynonymサブウェイNeutralA loanword, the American-style term for a subway; in practice it mostly appears in shop names and is not used in everyday talk about trains.
• Synonym地下鉄道ちかてつどうWrittenThe formal full form of 「地下鉄」; found mainly in written or formal prose and used far less often in speech.

Say 「地下鉄」 when talking about the subway in daily life; 「メトロ」 mostly appears in names like 「東京メトロ」, 「サブウェイ」 in shop names, and 「地下鉄道」 is the formal written full name.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 都市としを走はしる鉄道てつどうなどの大量たいりょう輸送ゆそう機関きかん。
2. 地下鉄ちかてつ。元々もともとはパリの地下鉄ちかてつを指さす。