WordReference Random House Learner's Dictionary of American English © 2017
re•dun•dant /rɪˈdʌndənt/USA pronunciation   adj. 
  1. exceeding what is usual or necessary, esp., having or showing too many words or unnecessary repetition in expressing ideas:It is redundant to say "The giant is big.''
  2. (of a system, equipment, etc.) supplied as a backup in case of the failure of a main part, as in a spacecraft.
  3. British Terms[Chiefly Brit.]being laid off from employment.

WordReference Random House Unabridged Dictionary of American English © 2017
re•dun•dant  (ri dundənt),USA pronunciation adj. 
  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. Civil Engineering[Engin.]
    • (of a structural member) not necessary for resisting statically determined stresses.
    • (of a structure) having members designed to resist other than statically determined stresses;
    • noting a complete truss having additional members for resisting eccentric loads. Cf.  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. Linguisticscharacterized by redundancy;
  7. Computingcontaining more bits or characters than are required, as a parity bit inserted for checking purposes.
  8. British Terms[Chiefly Brit.]removed or laid off from a job.
re•dundant•ly, adv. 
  • Latin redundant- (stem of redundāns), present participle of redundāre to flow back, overflow, be excessive. See redound, -ant
  • 1595–1605
    • 1.See corresponding entry in Unabridged verbose, repetitive. See  wordy. 
    • 2.See corresponding entry in Unabridged excessive;
      superfluous, tautologous.

Collins Concise English Dictionary © HarperCollins Publishers::

redundant /rɪˈdʌndənt/ adj
  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
Etymology: 17th Century: from Latin redundans overflowing, from redundāre to run back, stream over; see redound

reˈdundantly adv

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