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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)
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