Meaning of Redundancy

What is Redundancy:

A redundancy can be the repetition or repeated use of a word or expression to express an idea, as well as the excess or excessive abundance of anything. The word, as such, comes from Latin redundant.

Redundancies, in language, are ways of expressing things by repeating or reiterating certain words, ideas or concepts, in order to emphasize the message that you want to convey. It is, as such, an expressive device, but it may incur tautology.

In information theory, redundancy is considered a property of messages according to which, thanks to the existence of repetitions or predictable parts that do not actually provide new information, the rest of the message can be inferred. It is, above all, a fundamental communication strategy to avoid misunderstandings or errors in decoding.

Synonyms of redundancy, meanwhile, can be abundance or excess, or repetition, reiteration or pleonasm. Antonyms would be scarcity or paucity.

Redundancy in rhetoric

In rhetoric, redundancy is a literary figure called pleonasm. It is characterized by not adding new information to the message to be transmitted, but by insisting or emphasizing some part of that message.

Examples of redundancies:

  • Climb up
  • Down down
  • Go out
  • To repeat
  • Eyewitness
  • Fly through the air
  • Clearly obvious
  • Cold ice

See also Pleonasmus.

Redundancy in IT systems

In computing and systems, redundancy is the simplest means of having a high availability system or, in other words, a backup.

The redundancy of network interfaces, computers, servers, internal power supplies, etc., allow a system to remain in perfect working order in the event of failure of any of its components.

An example of redundancy would be the repetition of data contained in a database. Thus, in the event of a failure, the data would not be lost.

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