【上位】 an area within a building enclosed by walls and floor and ceiling; "the rooms were very small but they had a nice view" 壁、床、天井に囲まれている建物内の区域。
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【下位】 (nautical) a toilet on board a boat or ship ボートまたは船に乗ったトイレ。
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【下位】 a lavatory (particularly a lavatory in a public place) 洗面所（特に公共の場の洗面所）。
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a bathroom sink that is permanently installed and connected to a water supply and drainpipe; where you can wash your hands and face; "he ran some water in the basin and splashed it on his face" 給水と排水管に永久に、インストールされて、接続されるバスルームの洗面台。手と顔を洗うことができるところ。
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