Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “cipher”

cipher

noun [C]  /ˈsɑɪ·fər/ us  

cipher noun [C] (SECRET WRITING)

a system of writing that most people cannot understand, so that the message is secret; a code: We spent a lot of time figuring out the enemy’s cipher.

cipher noun [C] (NOTHING)

a zero, or a person or thing that has no value or importance: In the hands of a lesser actor, the role could have easily been a cipher.
(Definition of cipher from the Cambridge Academic Content Dictionary © Cambridge University Press)
What is the pronunciation of cipher?
Add Cambridge dictionaries to your browser to your website

Definitions of “cipher” in other dictionaries

Word of the Day

initial

of or at the beginning

Word of the Day

Come on – you can do it! Phrasal verbs with ‘come’.

by Liz Walter​,
November 19, 2014
As part of an occasional series on the tricky subject of phrasal verbs, this blog looks at ones formed with the verb ‘come’. If you are reading this blog, I’m sure you already know come from, as it is one of the first things you learn in class: I come from Scotland/Spain.

Read More 

ped-text verb

November 24, 2014
to text someone while walking I’m ped-texting, I’m looking down at my phone, 75 percent of the time.

Read More