redund.

Adjective

redundant (comparative more redundant, superlative most redundant)

1. Superfluous; exceeding what is necessary (and therefore no longer needed because other things fulfill its task or purpose).
   • It is allowed, that Senates and great Councils are often troubled with redundant, ebullient, and other peccant Humours, with many Diſeaſes of the Head and more of the Heart; […]1726 October 28, [Jonathan Swift], “A Further Account of the Academy. […]”, in Travels into Several Remote Nations of the World. […] [Gulliver’s Travels], volume II, London: […] Benj[amin] Motte...
2. (etc) Repetitive or needlessly wordy.
3. Duplicating or able to duplicate the function of another component of a system, providing backup in the event the other component fails.
   • The two lines are mainly used for redundant and therefore fault-tolerant message transmission, but they can also transmit different messages.2013, Tom Denton, Automobile Electrical and Electronic Systems, page 142
4. Containing duplicate pathways to send a message.
5. (Australia, Ireland, New Zealand, UK) Dismissed from employment because no longer needed.
   • Four employees were made redundant.

   Synonyms:

   surplus to requirements

6. Obsolete or outdated; discarded, or fit to be discarded.
   • A knocked out Panther tank lies redundant in the river.2013, Bob Carruthers, Panther V in Combat, Coda Books Ltd, →ISBN