| [/ˈsaɪfə(r); ˋsaɪfɚ/] n 用法:
1 (a) [C, U] (method of) secret writing in which a set of letters or symbols is used to represent others; code 密码编写（的方法）; 密码:
a message in cipher 密码信.
(b) [C] message written in this way 用密码写的信息.
(C) [C] key1(5b) to a secret message 密码索引; 密码检索本. 用法:
2 [C] the symbol 0, representing nought or zero 0（代表无或零的符号）; 零. 用法:
3 [C] any of the numbers from 1 to 9 从1至9的任何阿拉伯数字. 用法:
4 [C] (fig derog 比喻, 贬) person or thing of no importance 不重要的人或物:
a mere cipher 无足轻重的人. |