Cipher, any method of transforming a message to conceal its meaning. The term is also used synonymously with ciphertext or cryptogram in reference to the encrypted form of the message. All …

CIPHER meaning: 1. a system of writing that prevents most people from understanding the message: 2. a person or…. Learn more.

CIPHER definition: a secret method of writing or recording data, such as by substituting or adding letters or numbers, using specially formed symbols, or the like; code. See examples of cipher used in a …

CIPHER definition: 1. a system of writing that prevents most people from understanding the message: 2. a person or…. Learn more.

11 meanings: 1. a method of secret writing using substitution or transposition of letters according to a key 2. a secret.... Click for more definitions.

A cipher is a secret code, usually one that's created using a mathematical algorithm. Sometimes the message written in code is itself called a cipher.

Definition of cipher noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Nov 5, 2025 · cipher (third-person singular simple present ciphers, present participle ciphering, simple past and past participle ciphered) (intransitive, regional, dated) To calculate. quotations