1. 《米》 a story,《英》 a storey; a floor(▼storyは建物を外から見たときの語でfloorは建物の内部にある各階の床)
    • 1階
    • 《米》 the first floor [story]/《英》 the ground floor
    • 2階
    • 《米》 the second floor [story]/《英》 the first floor
    • 地階
    • the basement
    • 地下2階
    • a sub-basement/the second basement (level)
    • 中2階
    • a mezzanine (floor)
    • 最上階に
    • on the top floor
    • 2階建ての家
    • 《米》 a two-story [two-storied] house/《英》 a two-storey house
    • 地上15階地下3階建てのビル
    • a building with fifteen floors plus three basement levels
    • このビルは何階建てか
    • How many floors does this building have?
    • 彼の事務所は何階にあるのですか
    • Which floor is his office on?
    • 各階止まりのエレベーター
    • an elevator that stops at [on] each floor
    • 主寝室は上の階[下の階]です
    • The master bedroom is upstairs [downstairs].