redundancy

noun

re·​dun·​dan·​cy ri-ˈdən-dən(t)-sē 

plural redundancies

1

a

: the quality or state of being redundant : superfluity

b

: the use of redundant components

also : such components

c

chiefly British : dismissal from a job especially by layoff

2

: profusion, abundance

3

a

: superfluous repetition : prolixity

b

: an act or instance of needless repetition

4

: the part of a message that can be eliminated without loss of essential information

Did you know?

Redundancy, closely related to redound, has stayed close to the original meaning of "overflow" or "more than necessary". Avoiding redundancy is one of the prime rules of good writing. ""In the modern world of today" contains a redundancy; so does "He died of fatal wounds" and "For the mutual benefit of both parties". But redundancy doesn't just occur in language. "Data redundancy" means keeping the same computer data in more than one place as a safety measure, and a backup system in an airplane may provide redundancy, again for the sake of safety.

Synonyms

• repetition
• repetitiveness
• verbosity
• wordiness
• prolixity
• diffusion
• diffuseness
• wordage
• logorrhea
• circumlocution

Examples of redundancy in a Sentence

Avoid redundancy in your writing.

Try to avoid using redundancies in your writing.

The design incorporates several redundancies.

a system with a high level of redundancy

The restructuring is expected to result in the redundancy of several hundred workers.

The workers are now facing redundancy.

Recent Examples on the Web

Include a buffer for travel costs, technology redundancy, and the premium services that make location independence sustainable. —Jodie Cook, Forbes.com, 11 Sep. 2025

The Jetson One is designed with fly-by-wire technology and joystick controls for intuitive flight, multiple engines for redundancy, and a ballistic parachute as a safety feature. —Michael Verdon, Robb Report, 10 Sep. 2025

There’s redundancy in our knowledge base. —Angela Velasquez, Sourcing Journal, 2 Sep. 2025

The system utilizes multiple layers of redundancy and advanced navigation technology to improve safety and achieve the levels of integrity and reliability necessary for uncrewed flight. —Prabhat Ranjan Mishra, Interesting Engineering, 30 Aug. 2025

Word History

First Known Use

1601, in the meaning defined at sense 1a

Kids Definition

redundancy

noun

re·​dun·​dan·​cy ri-ˈdən-dən-sē 

plural redundancies

1

: the quality or state of being redundant

2

a

: the use of unnecessary words

b

: an act or instance of needless repetition