Redundant

adjective
1.
characterized by verbosity or unnecessary repetition in expressing ideas; prolix:
a redundant style.
2.
being in excess; exceeding what is usual or natural:
a redundant part.
3.
having some unusual or extra part or feature.
4.
characterized by superabundance or superfluity:
lush, redundant vegetation.
5.
Engineering.

(of a structural member) not necessary for resisting statically determined stresses.
(of a structure) having members designed to resist other than statically determined stresses; hyperstatic.
noting a complete truss having additional members for resisting eccentric loads.
Compare complete (def 8), incomplete (def 3).
(of a device, circuit, computer system, etc.) having excess or duplicate parts that can continue to perform in the event of malfunction of some of the parts.

6.
Linguistics. characterized by redundancy; predictable.
7.
Computers. containing more bits or characters than are required, as a parity bit inserted for checking purposes.
8.
Chiefly British. removed or laid off from a job.
adjective
1.
surplus to requirements; unnecessary or superfluous
2.
verbose or tautological
3.
deprived of one’s job because it is no longer necessary for efficient operation: he has been made redundant
4.
(of components, information, etc) duplicated or added as a precaution against failure, error, etc