Redundancy

Redundancy may refer to:

Language

• Redundancy (linguistics), the construction of a phrase that presents some idea using more information, often via multiple means, than is necessary for one to be able to understand the idea
• Tautology (rhetoric), an unnecessary or unessential (and sometimes unintentional) repetition of meaning, using different and dissimilar words that effectively say the same thing twice (often originally from different languages)
• Pleonasm, the use of more words or word-parts than is necessary for clear expression, often redundantly
• Logorrhoea (linguistics), an excessive flow of words more generally

Examples raise up, lower down.

Literature and arts

• Redundant (play), by Leo Butler
• "Redundant" (song), a song recorded by the American rock band Green Day in 1997

Science and technology

• Redundancy (engineering)
• Redundancy (information theory)
• Redundancy (total quality management)
• Redundancy (user interfaces)
• Redundant code, computer program code that is executed but has no effect on the output of the program
• Database normalization, the elimination of redundancy in databases
• Redundancy check, Error detection realized using a hash function or checksum algorithm
• Logic redundancy
• Data redundancy
• Gene redundancy

Other uses

• Redundant acronym syndrome syndrome
• Redundant church
• Layoff, (also called redundancy in some Commonwealth countries) dismissal of an employee for lack of available work; Redundancy payments (in U.K.)