redundancy

noun6

1. •
   The state of being redundant.
2. •
   (UK, Australia) The state of being unemployed because one's job is no longer necessary; the dismissal of such an employee; a layoff.

   • Has he received any representation from Air New Zealand management about redundancy proposals for Air New Zealand staff; and, if so, do these proposals include redundancy agreements? — 1981
3. •
   A superfluity; something redundant or excessive; a needless repetition in language.
4. •
   surplusage inserted in a pleading which may be rejected by the court without impairing the validity of what remains.
5. •
   A duplication of components or circuits to provide survival of the total system in case of failure of single components.

   • Staff redundancy is needed in the event that a supervisor and key unit supervisors are not present or unable to act in an emergency. — 2006
6. •
   Duplication of parts of a message to guard against transmission errors.