say it: ri-DUHN-duhn-see
redundancy is a noun meaning "repetition of messages to reduce the probability of errors in transmission". It carries 4 recorded senses.
repetition of messages to reduce the probability of errors in transmission
the attribute of being superfluous and unneeded
“the use of industrial robots created redundancy among workers”
(electronics) a system design that duplicates components to provide alternatives in case one component fails
electronics
repetition of an act needlessly
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 redundancy 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.