stairway這五個詞都有樓梯的意思？

stair，n.1. (階梯等的)一級，梯級2. [用復數，用作單數或復數]階梯，樓梯3. [用復數]【船舶學】浮動平臺4. 階梯，途徑stair [stε?] n. 英語解釋：support consisting of a place to rest the foot while ascending or descending a stairwaystairs——是stair的復數形式。staircase ['stε?keis] n.樓梯；樓梯間【即可指“樓梯”，還可指“設置樓梯的房間部分”】英語解釋：a way of access (upward and downward) consisting of a set of stepsstairway n.【建筑專業用詞】 階梯，樓梯英語解釋：a way of access (upward and downward) consisting of a set of steps當然，指代“臺階，階梯”時，stair與step一般可互換。