柯林斯词典mattress /ˈmætrɪs/ (mattresses) 1. N-COUNT A mattress is the large, flat object which is put on a bed to make it comfortable to sleep on. 牀墊 返回 mattress剑桥词典the part of a bed , made of a strong cloth cover filled with firm material , that makes the bed comfortable to lie on 牀墊，褥墊 返回 mattress