redundancy

Noun
  1. Repetition of messages to reduce the probability of errors in transmission (synset 107105130)
  2. The attribute of being superfluous and unneeded (synset 105127610)
    "the use of industrial robots created redundancy among workers"
  3. (electronics) a system design that duplicates components to provide alternatives in case one component fails (synset 105738108)
  4. Repetition of an act needlessly (synset 101021190)

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