被单 Traditional form: 被單 Pinyin (reading): bèidān Definitions: (bed) sheet envelope for a padded coverlet CL:床 (chuáng) Characters: 被 - bedding; a passive particle meaning "by" 单 - single, individual, only; lone Traditional characters: 被 - bedding; a passive particle meaning "by" 單 - single, individual, only; lone