Jisho

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Noun, No-adjective
1. basement; cellar; underground place
  • そして
  • おすい汚水
  • なが流す
  • ために
  • ちか地下
  • げすいどう下水道
  • 持っていた
  • The house has pipes under the ground to carry dirty water away.
Prefix
2. underground; below ground
3. secret; under cover
  • かれ
  • ちか地下
  • かつどう活動
  • うたが疑いをかけられた
  • He was suspected of underground action.
Noun
4. underground (railway); subway; metroColloquialism, Abbreviation
Wikipedia definition
5. Subterranea (geography)Subterranea refers to underground structures, both natural and man-made. Some subterranea include: Bunker Casemate Catacombs Caves Ice caves Cave dwellings, Cave house Cave temple Cellar Cenote Dungeon Dugout (shelter) Karst Gallery Lava tubes Lunar lava tube Rock cut architecture, rock grave Subterranean rivers Tunnels (street tunnel, train tunnels) Underground city Underground lakes Underground rapid transit systems Volcanic pipes Wine caves
Read “Subterranea (geography)” on English Wikipedia
Read “地下” on Japanese Wikipedia
Read “Subterranea (geography)” on DBpedia

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