cipher

American  

[sahy-fer] / ˈsaɪ fər /

noun

1. 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.

   The spies exchanged messages using a complex cipher.

   The encryption software creates unbreakable ciphers for secure communication.

2. writing, or a piece of writing, done by a secret method; a coded message.

   Hostile agents intercepted the cipher and began trying to figure out its meaning.

3. the key to a secret method of writing.

   After a year of studying the coded messages, the analysts were no closer to discovering the cipher.

4. someone or something that is not understood; mystery or enigma.

   I just can’t figure him out—he’s a complete cipher to me.

5. zero.

6. a person or thing of no influence or importance; nonentity.

   Having lost the party leadership, she is now a mere cipher on the political scene.

7. Usually cypher

   1. a performance by a group of rappers, hip-hop artists, or break dancers who take turns improvising individual verses, dances, etc.

   2. an individual verse, dance, etc., that is part of such a performance.

8. any of the Arabic numerals, such as 1, 2, or 3, or any number written with such numerals, such as 476.

9. Arabic numerical notation collectively.

   The date is MXML in Roman numerals, or 1950 in cipher.

10. a combination of letters, such as the initials of a name, in one design; monogram.

    The cipher for Queen Elizabeth II had an E entwined with an R for regina, Latin for “queen,” on either side of a Roman numeral II.

---

verb (used without object)

1. to use figures or numerals arithmetically; do arithmetic.

   He had never learned to read or write, but he could cipher.

2. to write messages in or as if in a secret code.

verb (used with object)

1. to convert into code; encrypt.

   The program works by ciphering or scrambling the data.

2. to figure out the meaning of; interpret or decode (often used without ).

   Using a good phrase book, the tourist was able to cipher out what people were saying.

3. to calculate numerically; figure (often used without ).

   I tried to cipher out the interest on the loan, compounded over five years.

cipher British  

/ ˈsaɪfə /

noun

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

8. music a defect in an organ resulting in the continuous sounding of a pipe, the key of which has not been depressed

---

verb

1. to put (a message) into secret writing

2. (intr) (of an organ pipe) to sound without having the appropriate key depressed

3. rare to perform (a calculation) arithmetically

Other Word Forms

• cipherable adjective
• cipherer noun

Etymology

Origin of cipher

First recorded in 1350–1400; Middle English siphre, from Medieval Latin ciphra, from Arabic ṣifr “empty, zero”; translation of Sanskrit śūnyā “empty”

Example Sentences

Could you give me a cipher and let me know how to reach him?

From Literature

They were challenged to embed hidden codes, and ciphers into their designs.

From BBC

Gabriel could have come across as a mere cipher in this environment, a faceless spook navigating smoke and mirrors.

From The Wall Street Journal

“Election Day” isn’t a space, say, with complex cipher codes to untangle.

From Los Angeles Times

Some maintain that Orange County is still basically a cultural cipher--and some who adhere to this notion are home-grown.

From Los Angeles Times

Related Words

• nonentity