cipher
nounUK /ˈsaɪfə/
US /ˈsaɪfər/
A secret code that hides what a message says.
The spy wrote the note in cipher so no one else could read it.
SYNONYMS
RELATED WORDS
OTHER MEANINGS
2. A zero or the number 0.
The score was a cipher until the last minute of the game.
3. A person who seems unimportant or has no influence.
He felt like a cipher in the big company.
4. To put a message into secret code.
They ciphered the plan before sending it.