redundancy redundancy /rɪˈdʌndənsi/

noun

1. () The attribute of being superfluous and unneeded  ( redundance , superfluousness , redundancy )
   the attribute of being superfluous and unneeded
    The use of industrial robots created redundancy among workers
   the use of industrial robots created redundancy among workers
   
2. () Repetition of messages to reduce the probability of errors in transmission  ( redundancy )
   repetition of messages to reduce the probability of errors in transmission
    The message had a lot of redundancy to ensure the information was understood.
   The message had a lot of redundancy to ensure the information was understood.
   
   
3. Repetition of an act needlessly  ( redundancy )
   repetition of an act needlessly
   
4. (electronics) a system design that duplicates components to provide alternatives in case one component fails  ( redundancy )
   (electronics) a system design that duplicates components to provide alternatives in case one component fails