noun
plural -cies
[noncount] :the act of using a word, phrase, etc., that repeats something else and is therefore unnecessary
[count] :a word, phrase, etc., that repeats something else and is therefore unnecessary :a redundant word, phrase, etc.
technical :a part in a machine, system, etc., that has the same function as another part and that exists so that the entire machine, system, etc., will not fail if the main part fails [count]
Brit
the act of ending the employment of a worker or group of workers [count]
[noncount] :the fact of being dismissed from a job because you are no longer needed
