say it: SAHY-fur
cypher is a noun and verb meaning "a mathematical element that when added to another number yields the same number". It carries 7 recorded senses.
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”
a person of no influence
a secret method of writing
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for cypher come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.