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Definition of redundant
1a : exceeding what is necessary or normal : superfluous
c : characterized by similarity or repetition
a group of particularly redundant brick buildings
d chiefly British : no longer needed for a job and hence laid off
3 : serving as a duplicate for preventing failure of an entire system (such as a spacecraft) upon failure of a single component
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Time Traveler for redundant
The first known use of redundant was in 1594
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