地下鉄|ちかてつchikatetsu[0]heiban (flat)

1. nounsubway; metro; underground (railway)
   地下鉄ちかてつで行いきたいのです。↗

   I want to get there by subway.

• SynonymメトロNeutralLoanword used mainly in the names of operating companies and lines, as in 「東京メトロ」; carries an urban, modern feel.
• SynonymサブウェイNeutralA loanword that is rarely used in Japan for the subway itself; many Japanese will first think of the sandwich chain.
• Synonym地下鉄道ちかてつどうWrittenThe full form of 「地下鉄」; mostly seen in laws, regulations and other formal documents rather than everyday speech.
• Antonym高架鉄道こうかてつどうWrittenThe opposite of 「地下鉄」: a railway that runs on tracks raised high above the ground.

For the subway, 「地下鉄」 is the default word. 「メトロ」 appears mostly in company and line names like 「東京メトロ」, 「地下鉄道」 is the formal full form used in official documents, and 「高架鉄道」 means an elevated railway.

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

1. 地下ちか鉄道てつどうの略りゃく。大都市だいとしにおける効率的こうりつてきな土地とち利用りようを目的もくてきに敷設ふせつされ、主しゅたる軌道きどう及および駅えき設備せつびの多おおくを地下ちかに有ゆうする鉄道てつどうのこと。