地ち下か鉄てつちかてつCommon wordJLPTN5Freq.FrequencyTop 5,000Meanings1nounsubway; metro; underground railwayabbreviationAbbreviation of 地下鉄道. Refers to an urban underground railway system.See also: 地下鉄道東とう京きょうの地ち下か鉄てつはとても便べん利りです。The Tokyo subway is very convenient.