Below are possible answers for the crossword clue Cipher.
4 letter answer(s) to cipher
CODE
(computer science) the symbolic arrangement of data or instructions in a computer program or the set of such instructions
a coding system used for transmitting messages requiring brevity or secrecy
a set of rules or principles or laws (especially written ones)
attach a code to; "Code the pieces with numbers so that you can identify them later"
convert ordinary language into code; "We should encode the message for security reasons"
ZERO
a mathematical element that when added to another number yields the same number
a quantity of no importance; "it looked like nothing I had ever seen before"; "reduced to nil all the work we had done"; "we racked up a pathetic goose egg"; "it was all for naught"; "I didn't hear zilch about it"
adjust (an instrument or device) to zero value
adjust (as by firing under test conditions) the zero of (a gun); "He zeroed in his rifle at 200 yards"
having no measurable or otherwise determinable value; "the goal is zero population growth"
indicating an initial point or origin
indicating the absence of any or all units under consideration; "a zero score"
Nothing
of or relating to the null set (a set with no members)
the point on a scale from which positive or negative numerical quantities can be measured
the sight setting that will cause a projectile to hit the center of the target with no wind blow
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