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cipher code


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Also see: code

WordReference Random House Learner's Dictionary of American English © 2026
ci•pher /ˈsaɪfɚ/USA pronunciation   n. [countable]
  1. Mathematics zero.
  2. Mathematicsany of the Arabic numerals or figures.
  3. a person or thing of little or no value;
    nothing:was a mere cipher in that department.
  4. Cryptography
    • a secret method of writing, as by code:developed a cipher to use in communicating.
    • writing done by such a method;
      a coded message:We couldn't read the cipher.
  5. Cryptographythe key to a secret method of writing:She uncovered the cipher after days of analysis.

v. [~ + object]
  1. Cryptographyto write in or as in cipher:ciphered messages.
Also, esp. Brit., ˈcy•pher.
WordReference Random House Learner's Dictionary of American English © 2026
cy•pher /ˈsaɪfɚ/USA pronunciation   n., v. Chiefly Brit.
  1. Cryptography, British Terms cipher.

WordReference Random House Unabridged Dictionary of American English © 2026
ci•pher  (sī′fər),USA pronunciation n. 
  1. Mathematicszero.
  2. Mathematicsany of the Arabic numerals or figures.
  3. MathematicsArabic numerical notation collectively.
  4. something of no value or importance.
  5. a person of no influence;
    nonentity.
  6. Cryptographya secret method of writing, as by transposition or substitution of letters, specially formed symbols, or the like. Cf. cryptography.
  7. Cryptographywriting done by such a method;
    a coded message.
  8. Cryptographythe key to a secret method of writing.
  9. a combination of letters, as the initials of a name, in one design;
    monogram.

v.i. 
  1. Mathematicsto use figures or numerals arithmetically.
  2. Cryptographyto write in or as in cipher.

v.t. 
  1. Mathematicsto calculate numerically;
    figure.
  2. Cryptographyto convert into cipher.
Also,[esp. Brit.,] cypher. 
  • Arabic ṣifr empty, zero; translation of Sanskrit śūnyā empty
  • Medieval Latin ciphra
  • Middle English siphre 1350–1400
ci′pher•a•ble, adj. 
ci′pher•er, n. 

WordReference Random House Unabridged Dictionary of American English © 2026
cy•pher  (sī′fər),USA pronunciation n., v.i., v.t. [Chiefly Brit.]
  1. Cryptography, British Termscipher.

Collins Concise English Dictionary © HarperCollins Publishers::
cipher, cypher /ˈsaɪfə/ n
  1. a method of secret writing using substitution or transposition of letters according to a key
  2. a secret message
  3. the key to a secret message
  4. an obsolete name for zero
  5. any of the Arabic numerals (0, 1, 2, 3, etc, to 9) or the Arabic system of numbering as a whole
  6. a person or thing of no importance; nonentity
  7. a design consisting of interwoven letters; monogram
 vb
  1. to put (a message) into secret writing
  2. rare to perform (a calculation) arithmetically
Etymology: 14th Century: from Old French cifre zero, from Medieval Latin cifra, from Arabic sifr zero, empty
Collins Concise English Dictionary © HarperCollins Publishers::
cypher /ˈsaɪfə/ n , vb
  1. a variant spelling of cipher
'cipher code' also found in these entries (note: many are not synonyms or translations):
cryptic

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