*sheet/ʃit; ʃiːt/ n [C] 1 a large piece of thin cloth that you put on a bed to lie on or under 被单，床单: Have you changed the sheets? (=put clean sheets on the bed) 你换过被单了吗？ 2 a thin flat piece of paper, metal, glass etc 〔纸、金属、玻璃等的〕片，块，张: a sheet of paper 一张纸